**Backport:** https://codeberg.org/forgejo/forgejo/pulls/8771
- It seems that mid-May (according to some system notices in Codeberg) Github started (or converted all) release asssets to be made available under `https://release-assets.githubusercontent.com/`.
- Update the migration code to allow this baseURL for Github release assets.
- ResolvesCodeberg/Community#2061
Co-authored-by: Gusted <postmaster@gusted.xyz>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8899
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
Co-committed-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>