Bump anchore/sbom-action from 0.15.8 to 0.15.9 (grafana#3476)

Bumps [anchore/sbom-action](https://github.com/anchore/sbom-action) from 0.15.8 to 0.15.9.
- [Release notes](https://github.com/anchore/sbom-action/releases)
- [Commits](anchore/sbom-action@v0.15.8...v0.15.9)

---
updated-dependencies:
- dependency-name: anchore/sbom-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>

.github/workflows/sbom-report.yml

@@ -14,7 +14,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Anchore SBOM Action
-      uses: anchore/sbom-action@v0.15.8
+      uses: anchore/sbom-action@v0.15.9
       with:
          artifact-name: ${{ github.event.repository.name }}-spdx.json