ci(trivy): fetch vulnerabilities DB from ERC (#721)

Signed-off-by: Michael Beemer <beeme1mr@users.noreply.github.com>

Author: beeme1mr

.github/workflows/pr-checks.yml

@@ -75,13 +75,15 @@ jobs:
           cache-from: type=gha,scope=${{ github.ref_name }}-ofo
           cache-to: type=gha,scope=${{ github.ref_name }}-ofo
       - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@0.27.0
+        uses: aquasecurity/trivy-action@0.28.0
         with:
           input: ${{ github.workspace }}/open-feature-operator-local.tar
-          format: "template"
-          template: "@/contrib/sarif.tpl"
+          format: "sarif"
           output: "trivy-results.sarif"
           severity: "CRITICAL,HIGH"
+        env:
+          # use an alternative trivvy db to avoid rate limits
+          TRIVY_DB_REPOSITORY: public.ecr.aws/aquasecurity/trivy-db:2,ghcr.io/aquasecurity/trivy-db:2
       - name: Upload Trivy scan results to GitHub Security tab
         uses: github/codeql-action/upload-sarif@v2
         with: