Add some additional info about migrations to FEDERATION.md

Changes

1 changed files (+2/-0)

• FEDERATION.md
  • @@ -45,3 +45,5 @@ When opening a pull request to a remote repository, the pull request can be rend
    ## Migrations If you change your username or the name of repository, Gitea handles this similarly to how Mastodon does. Gitea will send a `Move` activity to your followers and update your actor to point to the new actor. + + Changing your instance or a repository's instance is more difficult, since this requires the data to be migrated between instances, but it could be handled in a similar way.