packit: Enable Bodhi updates for unstable Fedoras

As we don't only want to get Bodhi updates for the stable releases, but
also the ones still in development, we need to use 'fedora-branched'.

See https://packit.dev/docs/configuration/#aliases and
osbuild/osbuild-composer@82d4fbb

.packit.yaml

@@ -34,6 +34,6 @@ jobs:
 - job: bodhi_update
   trigger: commit
   dist_git_branches:
-    - fedora-stable # rawhide updates are created automatically
+    - fedora-branched # rawhide updates are created automatically
     - epel-8
     - epel-9