Bump anchore/scan-action from 3.5.0 to 6.4.0

Bumps [anchore/scan-action](https://github.com/anchore/scan-action) from 3.5.0 to 6.4.0.
- [Release notes](https://github.com/anchore/scan-action/releases)
- [Changelog](https://github.com/anchore/scan-action/blob/main/RELEASE.md)
- [Commits](anchore/scan-action@1d59d90...16910ac)

---
updated-dependencies:
- dependency-name: anchore/scan-action
  dependency-version: 6.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/check-vulnerabilities.yaml

@@ -29,7 +29,7 @@ jobs:
           COSIGN_EXPERIMENTAL=1 cosign verify-attestation --type spdx ${{ inputs.image }} | jq '.payload |= @base64d | .payload | fromjson | select( .predicateType=="https://spdx.dev/Document" ) | .predicate.Data | fromjson | .' > spdx.json
       - name: Scan image
         id: scan
-        uses: anchore/scan-action@1d59d90b47fc11ff8f97822da6c25eec888f81cf # ratchet:anchore/scan-action@v3
+        uses: anchore/scan-action@16910ac423301c6d30554b83a7f71ac6ff4a51f3 # ratchet:anchore/scan-action@v3
         with:
           sbom: spdx.json
           output-format: table