minor #16286 Correct spelling & grammar in 4.4 setup/ (gnito-org)

This PR was merged into the 4.4 branch.

Discussion
----------

Correct spelling & grammar in 4.4 setup/

<!--

If your pull request fixes a BUG, use the oldest maintained branch that contains
the bug (see https://symfony.com/releases for the list of maintained branches).

If your pull request documents a NEW FEATURE, use the same Symfony branch where
the feature was introduced (and `5.x` for features of unreleased versions).

-->

Commits
-------

7872cda Correct spelling & grammar in 4.4 setup/

Author: javiereguiluz

setup/bundles.rst

@@ -4,7 +4,7 @@
 Upgrading a Third-Party Bundle for a Major Symfony Version
 ==========================================================
 
-Symfony 3 was released on November 2015. Although this version doesn't contain
+Symfony 3 was released in November 2015. Although this version doesn't contain
 any new features, it removes all the backward compatibility layers included in
 the previous 2.8 version. If your bundle uses any deprecated feature and it's
 published as a third-party bundle, applications upgrading to Symfony 3 will no
@@ -26,8 +26,8 @@ Most third-party bundles define their Symfony dependencies using the ``~2.N`` or
         }
     }
 
-These constraints prevent the bundle from using Symfony 3 components, so it makes
-it impossible to install it in a Symfony 3 based application. Thanks to the
+These constraints prevent the bundle from using Symfony 3 components, which
+means the bundle cannot be installed in a Symfony 3 based application. Thanks to the
 flexibility of Composer dependencies constraints, you can specify more than one
 major version by replacing ``~2.N`` by ``~2.N|~3.0`` (or ``^2.N`` by ``^2.N|~3.0``).