Bump anchore/scan-action from 5 to 6

Bumps [anchore/scan-action](/~https://github.com/anchore/scan-action) from 5 to 6.
- [Release notes](/~https://github.com/anchore/scan-action/releases)
- [Changelog](/~https://github.com/anchore/scan-action/blob/main/CHANGELOG.md)
- [Commits](anchore/scan-action@v5...v6)

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

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

.github/workflows/docker-image-security-scan.yml

@@ -21,7 +21,7 @@ jobs:
         push: false
         load: true
     - name: Scan Docker image
-      uses: anchore/scan-action@v5
+      uses: anchore/scan-action@v6
       id: scan
       with:
         image: ${{ github.repository }}:test