chore(deps): Bump anchore/scan-action from 3.6.1 to 3.6.4 (#3877)

Bumps [anchore/scan-action](https://github.com/anchore/scan-action) from 3.6.1 to 3.6.4.
- [Release notes](https://github.com/anchore/scan-action/releases)
- [Changelog](https://github.com/anchore/scan-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/anchore/scan-action/compare/v3.6.1...v3.6.4)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Brennan Kinney <5098581+polarathene@users.noreply.github.com>

.github/workflows/generic_vulnerability-scan.yml

@@ -55,7 +55,7 @@ jobs:
           provenance: false
 
       - name: 'Run the Anchore Grype scan action'
-        uses: anchore/scan-action@v3.6.1
+        uses: anchore/scan-action@v3.6.4
         id: scan
         with:
           image: mailserver-testing:ci