[Security] Outdated docs for security voters

[crtl]

API for voters was changed but this change is not reflected in the documentation of:
How to Use Voters to Check User Permissions > The Voter Interface
https://symfony.com/doc/8.0/security/voters.html#the-voter-interface.

The code samples still show and reference the old voter api but supports and voteOnAttribute were removed.

The docs also dont mention that you can inject controller arguments into your voter by referencing the argument name in the IsGranted::subject argument but from the examples you can deduce that it is.
https://symfony.com/doc/8.0/security/voters.html#setup-checking-for-access-in-a-controller