Update actions/setup-node action to v6

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

@@ -36,7 +36,7 @@ jobs:
 
       - name: Set up Node.js
         if: steps.check-branch-exists.outputs.exists == 'true'
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: '22'
 
@@ -45,7 +45,7 @@ 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" -- 'hosts/**')

.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/**')