Repository: graphql-rust/juniper (language: rust)

Issue:
List of integrations does not match the book page order
**Describe the bug**
In the book, the [Adding a Server](https://graphql-rust.github.io/juniper/master/servers/index.html) and [Official Server Integrations](https://graphql-rust.github.io/juniper/master/servers/official.html) pages both list the official server integrations with links to subsequent pages in the book that describe the individual integrations. However, the order in both those lists doesn't match the order in which the reader would visit the pages by clicking the next page button. This can cause the reader who clicks on the top link to skip reading the pages on other integrations without knowing. 

**To Reproduce**
Steps to reproduce the behavior:

1. Either:
   1. Navigate to the [Adding a Server](https://graphql-rust.github.io/juniper/master/servers/index.html) page; or:
   1. Navigate to the [Official Server Integrations](https://graphql-rust.github.io/juniper/master/servers/official.html) page.
2. Notice that there is a link to the page for the integration of `Hyper` that precedes all the links to pages for the other integrations.
3. Click the top-most link to `Hyper`, which brings you to the [Integrating with Hyper](https://graphql-rust.github.io/juniper/master/servers/hyper.html) page.
4. Click to go to the next page in reading order (the arrow pointing to the right found on the right hand of the page on desktop screens and at the bottom of the page on mobile screens). 
5. Notice that you ended up on the [Third-Party Integrations](https://graphql-rust.github.io/juniper/master/servers/third-party.html) page and didn't get to read about the `Warm`, `Rocket` or `Iron` integrations.

**Expected behavior**
I would have expected the order in which the pages are linked to in the [Adding a Server](https://graphql-rust.github.io/juniper/master/servers/index.html) and [Official Server Integrations](https://graphql-rust.github.io/juniper/master/servers/official.html) pages to be the same as when I click the navigation arrow in the book.

**Additional context**
I am learning about `juniper` and this happened to me the first time I went through that section of the book. :)


Discussion / hints:

Fix patch:
diff --git a/docs/book/content/servers/index.md b/docs/book/content/servers/index.md
index aafc6b8c9..c60eab02e 100644
--- a/docs/book/content/servers/index.md
+++ b/docs/book/content/servers/index.md
@@ -7,7 +7,6 @@ To actually get a server up and running, there are multiple official and
 third-party integration crates that will get you there.
 
 - [Official Server Integrations](official.md)
-    - [Hyper](hyper.md)
     - [Warp](warp.md)
     - [Rocket](rocket.md)
     - [Iron](iron.md)
diff --git a/docs/book/content/servers/official.md b/docs/book/content/servers/official.md
index 990892f70..d5e2878ae 100644
--- a/docs/book/content/servers/official.md
+++ b/docs/book/content/servers/official.md
@@ -3,7 +3,7 @@
 Juniper provides official integration crates for several popular Rust server
 libraries.
 
-- [Hyper](hyper.md)
 - [Warp](warp.md)
 - [Rocket](rocket.md)
 - [Iron](iron.md)
+- [Hyper](hyper.md)


Test patch: