Also sync debian/bullseye branch

The test tries to clean up the scratch repository tags based on local tags; However the remote will only get tags on branches that were checked out (as push --follow-tags is used) while the local clone has all tags.

Unfortunately as debian/bullseye was imported there are now tags in the reference repository (and thus local repository) that aren't reachable by the default set of branches.

This should really be fixed by looking at the tags available on the destination rather then locally. But for now work around CI failing by also synchronizing the debian/bullseye branch

Signed-off-by: Sjoerd Simons sjoerd@collabora.com