Update Trivy vulnerability scanner

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/cve-scan.yml

@@ -17,7 +17,12 @@ jobs:
           IMAGE=test/podinfo:${GITHUB_SHA}
           docker build -t ${IMAGE} .
           echo "::set-output name=image::$IMAGE"
-      - name: Scan image
-        uses: docker://docker.io/aquasec/trivy:latest
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
         with:
-          args: --cache-dir /var/lib/trivy --no-progress --exit-code 1 --severity MEDIUM,HIGH,CRITICAL ${{ steps.build.outputs.image }}
+          image-ref: ${{ steps.build.outputs.image }}
+          format: table
+          exit-code: "1"
+          ignore-unfixed: true
+          vuln-type: os,library
+          severity: CRITICAL,HIGH