Use GITHUB_OUTPUT envvar instead of set-output command as the latter is deprecated

.github/workflows/cve-scan.yml

@@ -3,7 +3,7 @@ name: cve-scan
 on:
   push:
     branches:
-      - 'master'
+      - "master"
 
 permissions:
   contents: read
@@ -19,7 +19,7 @@ jobs:
         run: |
           IMAGE=test/podinfo:${GITHUB_SHA}
           docker build -t ${IMAGE} .
-          echo "::set-output name=image::$IMAGE"
+          echo "image=$IMAGE" >> $GITHUB_OUTPUT
       - name: Run Trivy vulnerability scanner
         uses: aquasecurity/trivy-action@master
         with: