Add GENDER support for 'thanks-error-ratelimited'

Spotted by Matma Rex and reported at
https://translatewiki.net/wiki/Thread:Support/About_MediaWiki:Thanks-error-ratelimited/en

Change-Id: Ib19f7297e6a99d89cc9465233d1604e55c330bfa
Merge "Add GENDER support for 'thanks-error-ratelimited'"