chore(deps): bump anchore/sbom-action in the ci group

Bumps the ci group with 1 update: [anchore/sbom-action](https://github.com/anchore/sbom-action).


Updates `anchore/sbom-action` from 0.20.11 to 0.21.0
- [Release notes](https://github.com/anchore/sbom-action/releases)
- [Changelog](https://github.com/anchore/sbom-action/blob/main/RELEASE.md)
- [Commits](anchore/sbom-action@43a17d6...a930d0a)

---
updated-dependencies:
- dependency-name: anchore/sbom-action
  dependency-version: 0.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/release.yaml

@@ -99,7 +99,7 @@ jobs:
         mkdir -p output
         helm template ./deploy --namespace ocm-system --set "manager.image.tag=${{ env.RELEASE_VERSION }}" --include-crds > ./output/install.yaml
     - name: Setup Syft
-      uses: anchore/sbom-action/download-syft@43a17d6e7add2b5535efe4dcae9952337c479a93 # v0.20.11
+      uses: anchore/sbom-action/download-syft@a930d0ac434e3182448fe678398ba5713717112a # v0.21.0
     - name: Setup Cosign
       uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad
     - name: Run goreleaser