Bump anchore/sbom-action from 0.15.6 to 0.15.8 (#1691)

Bumps [anchore/sbom-action](https://github.com/anchore/sbom-action) from 0.15.6 to 0.15.8.
- [Release notes](https://github.com/anchore/sbom-action/releases)
- [Commits](anchore/sbom-action@c6aed38...b6a39da)

---
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/release.yaml

@@ -53,7 +53,7 @@ jobs:
       - name: Install cosign
         uses:  sigstore/cosign-installer@9614fae9e5c5eddabb09f90a270fcb487c9f7149 # main
       - name: Install syft
-        uses: anchore/sbom-action/download-syft@c6aed38a4323b393d05372c58a74c39ae8386d02 # v0.15.6
+        uses: anchore/sbom-action/download-syft@b6a39da80722a2cb0ef5d197531764a89b5d48c3 # v0.15.8
 
       - name: Run GoReleaser Snapshot
         if: ${{ !startsWith(github.ref, 'refs/tags/') }}