ci: continuation of #318

.github/sync-to-mirrors.sh

@@ -99,7 +99,8 @@ while read -r PLUGIN_NAME; do
 
 	if [[ -n "$FORCE_COMMIT" || -n "$(git status --porcelain)" ]]; then
 		echo "Committing to $PLUGIN_NAME"
-		if git commit $FORCE_COMMIT --author="${COMMIT_AUTHOR}" -m "${COMMIT_MESSAGE} \n\nCo-authored-by: ${COMMIT_ACTOR}" &&
+		GIT_CLI_COMMIT_MESSAGE=$( printf "%s \n\nCo-authored-by: %s" "$COMMIT_MESSAGE" "$COMMIT_ACTOR" )
+		if git commit $FORCE_COMMIT --author="${COMMIT_AUTHOR}" -m "${GIT_CLI_COMMIT_MESSAGE}" &&
 			{ [[ -z "$CI" ]] || git push origin "$BRANCH"; } # Only do the actual push from the GitHub Action
 		then
 			# echo "$BUILD_BASE/changes.diff"