minor #17291 [Security] Fix typo (vlad-ghita)

This PR was submitted for the 6.1 branch but it was merged into the 4.4 branch instead.

Discussion
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[Security] Fix typo

Commits
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e92175f Fix typo

Author: javiereguiluz

security/access_denied_handler.rst

@@ -10,7 +10,7 @@ to disallow access to the user. Symfony will handle this exception and
 generates a response based on the authentication state:
 
 * **If the user is not authenticated** (or authenticated anonymously), an
-  authentication entry point is used to generated a response (typically
+  authentication entry point is used to generate a response (typically
   a redirect to the login page or an *401 Unauthorized* response);
 * **If the user is authenticated, but does not have the required
   permissions**, a *403 Forbidden* response is generated.