Backport #23920 by @ChristopherHX
Remove the misbehaving function and call
Repository.GetFilesChangedBetween instead.
Fixes#23919
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~~_TODO_ test this~~ `Repository.getFilesChanged` seems to be only used
by Gitea Actions, but a similar function already exists
**Update** I tested this change and the issue is gone.
Co-authored-by: ChristopherHX <christopher.homberger@web.de>