Update datetime.rst

Fixed "the the" typo.
Update datetime.rst
minor #4185 [Components][Form] Fixed typo in datetime type reference (althaus)

This PR was submitted for the 2.5 branch but it was merged into the 2.3 branch instead (closes #4185).

Discussion
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[Components][Form] Fixed typo in datetime type reference

Fixed "the the" typo.

Commits
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7c42e4b Update datetime.rst
d556309 Update datetime.rst
Update home of DoctrineExtensions.

As you can read in the 2014-03-20 DoctrineExtensions update: https://github.com/Atlantic18/DoctrineExtensions/blob/master/README.md#latest-updates

>
> DoctrineExtensions has new home on github under an unbrella of ORM designer organization.
>
minor #4186 Update home of DoctrineExtensions. (rubenrua)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #4186).

Discussion
----------

Update home of DoctrineExtensions.

As you can read in the 2014-03-20 DoctrineExtensions update: https://github.com/Atlantic18/DoctrineExtensions/blob/master/README.md#latest-updates

>
> DoctrineExtensions has new home on github under an unbrella of ORM designer organization.
>

Commits
-------

75c88a3 Update home of DoctrineExtensions.
Merge branch '2.3' into 2.4

* 2.3:
  Update home of DoctrineExtensions.
  Update datetime.rst
  Update datetime.rst