ci: bump aquasecurity/trivy-action

Bumps the patch-minor-dependencies group in /action-trivy-image-scan with 1 update: [aquasecurity/trivy-action](https://github.com/aquasecurity/trivy-action).


Updates `aquasecurity/trivy-action` from 0.16.1 to 0.20.0
- [Release notes](https://github.com/aquasecurity/trivy-action/releases)
- [Commits](aquasecurity/trivy-action@d43c1f1...b2933f5)

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

Signed-off-by: dependabot[bot] <support@github.com>

action-trivy-image-scan/action.yaml

@@ -8,7 +8,7 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - uses: aquasecurity/trivy-action@d43c1f16c00cfd3978dde6c07f4bbcf9eb6993ca # pin@v0.16.1
+    - uses: aquasecurity/trivy-action@b2933f565dbc598b29947660e66259e3c7bc8561 # pin@v0.20.0
       with:
         image-ref: ${{ inputs.image }}
         format: "table"