AO3-7573 Link to Permission question in Repost question in ToS FAQ

[jdewever]

In the ToS faq; link the section "granted you permission" in the question 'May I post someone else's fanworks, giving them credit?' to the 'How can I obtain permission to post, convert, podfic, or translate someone else's work?' question on the same page.

Pull Request Checklist

• Have you read the contributing guidelines?
• Have you read "How to write the perfect pull request"?
• Have you added tests for any changed functionality?
• Have you added the Jira issue number
  as the first thing in your pull request title (e.g. AO3-1234 Fix thing)
• Do you have fewer than 5 pull requests already open? If not, please wait
  until they are reviewed and merged before creating new pull requests.
• I acknowledge that submitting code created or modified with the help of AI is a bannable offense.

Issue

https://otwarchive.atlassian.net/browse/AO3-7573

Purpose

Link a section about obtaining permission from someone to the appropriate FAQ entry on the ToS FAQ page.
#repost_credit to #obtain_permission

Testing Instructions

Testing instructions already in the Jira issue.
(Locally the text "granted you permission" in the #repost_credit section is a link to the #obtain_permission question.)

Credit

Jon (Jonas De Wever) - he/him