minor #17566 Update routing.rst (micter59)

This PR was squashed before being merged into the 5.4 branch.

Discussion
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Update routing.rst

Add a note about allowing the http_method_override in the framework.yml file
symfony/symfony#48658

Commits
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576df85 Update routing.rst

Author: javiereguiluz

routing.rst

@@ -304,6 +304,13 @@ Use the ``methods`` option to restrict the verbs each route should respond to:
     ``_method`` with the method to use (e.g. ``<input type="hidden" name="_method" value="PUT">``).
     If you create your forms with :doc:`Symfony Forms </forms>` this is done
     automatically for you.
+    Also note that ```framework.http_method_override``` needs to be set for this to work :
+    
+    .. code-block:: yaml
+    
+        # config/packages/framework.yaml
+        framework:
+            http_method_override: true
 
 .. _routing-matching-expressions: