Docs: Add a `@since` note for un-deprecated `category_link` and `tag_link` filters.

Follow-up to [47576].

See #49759.
Built from https://develop.svn.wordpress.org/trunk@47578


git-svn-id: https://core.svn.wordpress.org/trunk@47353 1a063a9b-81f0-0310-95a4-ce76da25c4cd