test: fix trivy action

Author: andyzhangx

.github/workflows/trivy.yaml

@@ -30,6 +30,8 @@ jobs:
 
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
+        env:
+          TRIVY_DB_REPOSITORY: "public.ecr.aws/aquasecurity/trivy-db:2"
         with:
           image-ref: 'test/nfsplugin:latest-linux-amd64'
           format: 'table'