Make sure the distro is UNRELEASED during promotion

Signed-off-by: Simon Beaudoin <[email protected]>

Author: simonbeaudoin0935

.github/workflows/qcom-promote-upstream-reusable-workflow.yml

@@ -175,7 +175,7 @@ jobs:
           # use ignore branch because we are not on default debian branch
           gbp dch \
             --ignore-branch \
-            --distribution=${{env.DISTRIBUTION}} \
+            --distribution=UNRELEASED \
             --new-version=${{env.NORMALIZED_VERSION}}-1
 
           git commit -a -s -m "Update changelog for ${{env.NORMALIZED_VERSION}}-1 release"