fix: update image reference in VSCode automation workflow to use branch name instead of SHA

Author: tikazyq

.github/workflows/vscode-automation.yml

@@ -240,7 +240,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           # Pull the VSCode automation image
-          IMAGE_NAME="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}"
+          IMAGE_NAME="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.ref_name }}"
           docker pull "$IMAGE_NAME"
           
           echo "🤖 Running automation test for scenario: ${{ matrix.scenario }}"
@@ -364,7 +364,7 @@ jobs:
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
         with:
-          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
+          image-ref: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.ref_name }}
           format: 'sarif'
           output: 'trivy-results-vscode-automation.sarif'