minor #20764 Fix typo (ThomasLandauer)

This PR was merged into the 6.4 branch.

Discussion
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Fix typo

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Commits
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e363b74 Update messenger.rst: Typo

Author: OskarStark

messenger.rst

@@ -1563,7 +1563,7 @@ Install it by running:
 
     $ composer require symfony/doctrine-messenger
 
-The Doctrine transport DSN may looks like this:
+The Doctrine transport DSN may look like this:
 
 .. code-block:: env