Propagate GH action debug flag

Output debug messages if GH action is run in debug mode

.github/workflows/changelogs.yml

@@ -91,7 +91,7 @@ jobs:
         pip install python-bugzilla~=3.2.0
 
         CHANGED_FILES=$(gh api --paginate repos/$GIT_REPO/pulls/$PR_NUM/files | jq -r '.[].filename')
-        python .github/workflows/changelogs/changelogs.py -v \
+        python .github/workflows/changelogs/changelogs.py ${RUNNER_DEBUG:+-v} \
             --tracker-file $TRACKER_FILE --git-repo $GIT_REPO --uyuni-dir .head --pr-number $PR_NUM $CHANGED_FILES
 
   # Warns the user if they merged the PR, but the changelog test failed