minor #3654 [Cookbook][Security] Fix VoterInterface signature (bicpi)

This PR was merged into the 2.3 branch.

Discussion
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[Cookbook][Security] Fix VoterInterface signature

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | -

Commits
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750d527 [Cookbook][Security] Fix VoterInterface signature

cookbook/security/voter_interface.rst.inc

@@ -4,7 +4,7 @@
     {
         public function supportsAttribute($attribute);
         public function supportsClass($class);
-        public function vote(TokenInterface $token, $post, array $attributes);
+        public function vote(TokenInterface $token, $object, array $attributes);
     }
 
 The :method:`Symfony\\Component\\Security\\Core\\Authorization\\Voter\\VoterInterface::supportsAttribute`