scripts/sync-branch: Fix non-interactive merge

Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>

Author: vvoland

scripts/sync-branch

@@ -10,7 +10,7 @@ fi
 tags_to_sync=("$@")
 
 for tag_to_sync in "${tags_to_sync[@]}"; do
-	if git merge --no-ff "$tag_to_sync"; then
+	if git merge --no-edit --no-ff "$tag_to_sync"; then
 		continue
 	fi