minor #20239 Fix typo in value_resolver.rst (simoheinonen, OskarStark)

This PR was submitted for the 7.1 branch but it was merged into the 6.4 branch instead.

Discussion
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Fix typo in value_resolver.rst

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Commits
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c2b0315 Update controller/value_resolver.rst
56ab079 Update value_resolver.rst

controller/value_resolver.rst

@@ -106,7 +106,7 @@ Symfony ships with the following value resolvers in the
     .. tip::
 
         The ``DateTimeInterface`` object is generated with the :doc:`Clock component </components/clock>`.
-        This. gives your full control over the date and time values the controller
+        This gives you full control over the date and time values the controller
         receives when testing your application and using the
         :class:`Symfony\\Component\\Clock\\MockClock` implementation.