[doc] Add permissions to the getpeerinfo help.
[doc] Add permissions to the getpeerinfo help.

This field was already being returned, but the RPCHelpMan did not indicate
this. So, this PR updates the help text to match.

Github-Pull: #20756
Rebased-From: 667d203687708390bc0f43f2dd3f4ab427b88338

peercoin/peercoin,DigitalPandacoin/pandacoin,peercoin/peercoin,monacoinproject/monacoin,peercoin/peercoin,monacoinproject/monacoin,peercoin/peercoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,monacoinproject/monacoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,DigitalPandacoin/pandacoin,monacoinproject/monacoin,peercoin/peercoin,peercoin/peercoin,monacoinproject/monacoin,monacoinproject/monacoin