fix branch

.gitea/workflows/lint-test-helm.yaml

@@ -46,7 +46,7 @@ jobs:
         run: |
           set -e  # Exit immediately if a command exits with a non-zero status.
 
-          TARGET_BRANCH="${{ github.base_ref }}"
+          TARGET_BRANCH="origin/${{ github.base_ref }}"
           echo ">> Target branch for diff is: $TARGET_BRANCH"
 
           CHANGED_FILES=$(git diff --name-only "$TARGET_BRANCH" -- 'clusters/**')