build(deps): bump aquasecurity/trivy-action from 0.27.0 to 0.28.0 (#4484

)

Bumps [aquasecurity/trivy-action](https://github.com/aquasecurity/trivy-action) from 0.27.0 to 0.28.0.
- [Release notes](https://github.com/aquasecurity/trivy-action/releases)
- [Commits](aquasecurity/trivy-action@5681af8...915b19b)

---
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>

.github/workflows/trivy.yml

@@ -25,7 +25,7 @@ jobs:
         IMAGE=envoy-proxy/gateway-dev TAG=${{ github.sha }} make image
 
     - name: Run Trivy vulnerability scanner
-      uses: aquasecurity/trivy-action@5681af892cd0f4997658e2bacc62bd0a894cf564  # v0.27.0
+      uses: aquasecurity/trivy-action@915b19bbe73b92a6cf82a1bc12b087c9a19a5fe2  # v0.28.0
       with:
         image-ref: envoy-proxy/gateway-dev:${{ github.sha }}
         exit-code: '1'