Redirect old links and fix broken ones (#2774)
* redirect old links
* clean up nginx
* fix broken link in changelog
* fix broken links in guide
* fix broken links in other guide
* fix broken links in other guide
* move redirects from jinja to nginx
* changelog
* Update guides/06_other_tutorials/create_your_own_friends_with_a_gan.md
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>
Co-authored-by: Abubakar Abid <abubakar@huggingface.co>
