Repository: modin-project/modin
Pull request: DOCS-#3322: Specify proper OS versions for which installation packages are available
Signed-off-by: izamyati <igor.zamyatin@intel.com>

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## What do these changes do?
Update info about OSs where modin is available in documentation
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- [x] commit message follows format outlined [here](https://modin.readthedocs.io/en/latest/contributing.html)
- [x] passes `flake8 modin`
- [x] passes `black --check modin`
- [x] signed commit with `git commit -s` <!-- you can amend your commit with a signature via `git commit -amend -s` -->
- [x] Resolves #3322 <!-- issue must be created for each patch -->
- [ ] tests added and passing
- [x] module layout described at `docs/developer/architecture.rst` is up-to-date <!-- if you have added, renamed or removed files or directories please update the documentation accordingly -->


Problem statement:
Specify proper OS versions for which installation packages are available
### System information
- **OS Platform and Distribution (e.g., Linux Ubuntu 16.04)**:
- **Modin version** (`modin.__version__`):
- **Python version**:
- **Code we can use to reproduce**:

<!--
You can obtain the Modin version with

python -c "import modin; print(modin.__version__)"
-->

### Describe the problem
<!-- Describe the problem clearly here. -->
We need to clarify in docs for what OS each installation channel are available, eg conda's modin-omnisci is available only on Linux at the moment
### Source code / logs
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Hints from issue discussion:

Commit message: DOCS-#3322: Specify proper OS versions for which installation packages are available

Signed-off-by: izamyati <igor.zamyatin@intel.com>

Patch to review:
diff --git a/docs/installation.rst b/docs/installation.rst
index 90d89f84870..274730b3e59 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -12,7 +12,7 @@ Installing with pip
 Stable version
 """"""""""""""
 
-Modin can be installed with pip. To install the most recent stable release run the following:
+Modin can be installed with pip both on Linux and Windows. To install the most recent stable release run the following:
 
 .. code-block:: bash
 
@@ -62,19 +62,19 @@ Using conda-forge channel
 Modin releases can be installed using ``conda`` from conda-forge channel. Starting from 0.10.1
 it is possible to install modin with chosen engine(s) alongside. Current options are:
 
-+---------------------------------+---------------------------+
-| **Package name in conda-forge** | **Engine(s)**             |
-+---------------------------------+---------------------------+
-| modin                           | Dask_                     |
-+---------------------------------+---------------------------+
-| modin-all                       | Dask, Ray_, OmniSci_      |
-+---------------------------------+---------------------------+
-| modin-dask                      | Dask                      |
-+---------------------------------+---------------------------+
-| modin-ray                       | Ray                       |
-+---------------------------------+---------------------------+
-| modin-omnisci                   | OmniSci                   |
-+---------------------------------+---------------------------+
++---------------------------------+---------------------------+----------------------+
+| **Package name in conda-forge** | **Engine(s)**             | **Supported OSs**    |
++---------------------------------+---------------------------+----------------------+
+| modin                           | Dask_                     |   Linux, Windows     |
++---------------------------------+---------------------------+----------------------+
+| modin-dask                      | Dask                      |   Linux, Windows     |
++---------------------------------+---------------------------+----------------------+
+| modin-ray                       | Ray_                      |   Linux, Windows     |
++---------------------------------+---------------------------+----------------------+
+| modin-omnisci                   | OmniSci_                  |      Linux           |
++---------------------------------+---------------------------+----------------------+
+| modin-all                       | Dask, Ray, OmniSci        |      Linux           |
++---------------------------------+---------------------------+----------------------+
 
 So for installing Dask and Ray engines into conda environment following command should be used:
 
@@ -117,17 +117,9 @@ that these changes have not made it into a release and may not be completely sta
 Windows
 -------
 
-For installation on Windows, we recommend using the Dask_ Engine. Ray does not support Windows,
-so it will not be possible to install ``modin[ray]`` or ``modin[all]``. It is possible to use
+All Modin engines except :doc:`OmniSci</UsingOmnisci/index>` are available both on Windows and Linux as mentioned above. It is also possible to use
 Windows Subsystem For Linux (WSL_), but this is generally not recommended due to the limitations
-and poor performance of Ray on WSL, a roughly 2-3x cost. To install with the Dask_ engine, run the
-following using ``pip``:
-
-.. code-block:: bash
-
-    pip install modin[dask]
-
-You may already have a recent version of Dask_ installed, in which case you can simply ``pip install modin``.
+and poor performance of Ray on WSL, a roughly 2-3x cost. 
 
 Building Modin from Source
 --------------------------


Code review comments:
diff_hunk: @@ -62,19 +62,19 @@ Using conda-forge channel
 Modin releases can be installed using ``conda`` from conda-forge channel. Starting from 0.10.1
 it is possible to install modin with chosen engine(s) alongside. Current options are:
 
-+---------------------------------+---------------------------+
-| **Package name in conda-forge** | **Engine(s)**             |
-+---------------------------------+---------------------------+
-| modin                           | Dask_                     |
-+---------------------------------+---------------------------+
-| modin-all                       | Dask, Ray_, OmniSci_      |
-+---------------------------------+---------------------------+
-| modin-dask                      | Dask                      |
-+---------------------------------+---------------------------+
-| modin-ray                       | Ray                       |
-+---------------------------------+---------------------------+
-| modin-omnisci                   | OmniSci                   |
-+---------------------------------+---------------------------+
++---------------------------------+---------------------------+----------------------+
+| **Package name in conda-forge** | **Engine(s)**             | **Supported OSs**    |
++---------------------------------+---------------------------+----------------------+
+| modin                           | Dask_                     |   Linux, Windows     |
++---------------------------------+---------------------------+----------------------+
+| modin-dask                      | Dask                      |   Linux, Windows     |
path: docs/installation.rst
text: @user1:
Dask supports all three OSes including MacOS

diff_hunk: @@ -12,7 +12,7 @@ Installing with pip
 Stable version
 """"""""""""""
 
-Modin can be installed with pip. To install the most recent stable release run the following:
+Modin can be installed with pip both on Linux and Windows. To install the most recent stable release run the following:
path: docs/installation.rst
text: @user1:
Modin also supports MacOS