fix: Use branch ref to checkout workflow, use nutanix-runners.

.github/workflows/build-on-demand.yaml

@@ -10,15 +10,18 @@ on:
 
 jobs:
   build-trivy-bundle:
-    runs-on: ubuntu-latest
+    runs-on:
+      - self-hosted-nutanix-medium
     outputs:
       IMAGE_TIMESTAMP: ${{ steps.build-and-push-image.outputs.IMAGE_TIMESTAMP }}
     steps:
       - name: Clone trivy-bundles Repository
         uses: actions/checkout@v3
         with:
           repository: mesosphere/trivy-bundles
-          ref: main
+          #CRITICAL: Revert this back to main before merging
+          #ref: main
+          ref: ${{ github.ref_name }}
 
       - name: Login to Docker Hub
         uses: docker/login-action@v2