Bump aquasecurity/trivy-action from 0.8.0 to 0.9.0 (#404)

Bumps [aquasecurity/trivy-action](https://github.com/aquasecurity/trivy-action) from 0.8.0 to 0.9.0.
- [Release notes](https://github.com/aquasecurity/trivy-action/releases)
- [Commits](aquasecurity/trivy-action@9ab158e...cff3e9a)

---
updated-dependencies:
- dependency-name: aquasecurity/trivy-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -202,7 +202,7 @@ jobs:
           no-cache: ${{ github.event_name != 'pull_request' }}
 
       - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@9ab158e8597f3b310480b9a69402b419bc03dbd5 # 0.8.0
+        uses: aquasecurity/trivy-action@cff3e9a7f62c41dd51975266d0ae235709e39c41 # 0.9.0
         continue-on-error: true
         with:
           image-ref: ghcr.io/nginxinc/nginx-kubernetes-gateway:${{ steps.meta.outputs.version }}