minor #19375 Update controller.rst (Sarah-eit)

This PR was submitted for the 6.4 branch but it was merged into the 6.3 branch instead.

Discussion
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Update controller.rst

Delete the extra parenthesis.

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Commits
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eab9ad0 Update controller.rst

Author: javiereguiluz

controller.rst

@@ -761,7 +761,7 @@ Technically, Early Hints are an informational HTTP response with the status code
 status code and sends its headers immediately.
 
 This way, browsers can start downloading the assets immediately; like the
-``style.css`` and ``script.js`` files in the above example). The
+``style.css`` and ``script.js`` files in the above example. The
 ``sendEarlyHints()`` method also returns the ``Response`` object, which you
 must use to create the full response sent from the controller action.