minor #5613 Remove unneeded backtick (fabschurt)

This PR was merged into the 2.3 branch.

Discussion
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Remove unneeded backtick

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | >= 2.3
| Fixed tickets | N/A

Commits
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9979a72 Remove unneeded backtick

Author: wouterj

create_framework/http-kernel-controller-resolver.rst

@@ -91,7 +91,7 @@ introspects the controller signature to determine which arguments to pass to
 it by using the native PHP `reflection`_.
 
 The ``indexAction()`` method needs the Request object as an argument.
-```getArguments()`` knows when to inject it properly if it is type-hinted
+``getArguments()`` knows when to inject it properly if it is type-hinted
 correctly::
 
     public function indexAction(Request $request)