Update anchore/scan-action action to v6.4.0 (#268)

| datasource  | package             | from   | to     |
| ----------- | ------------------- | ------ | ------ |
| github-tags | anchore/scan-action | v6.3.0 | v6.4.0 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/docker.yml

@@ -143,7 +143,7 @@ jobs:
 
       - name: Scan SBOM
         id: scan
-        uses: anchore/scan-action@be7a22da4f22dde446c4c4c099887ff5b256526c # v6.3.0
+        uses: anchore/scan-action@16910ac423301c6d30554b83a7f71ac6ff4a51f3 # v6.4.0
         with:
           sbom: "sbom.json"
           only-fixed: true