Bump anchore/sbom-action from 0.20.4 to 0.20.6

Bumps [anchore/sbom-action](https://github.com/anchore/sbom-action) from 0.20.4 to 0.20.6.
- [Release notes](https://github.com/anchore/sbom-action/releases)
- [Changelog](https://github.com/anchore/sbom-action/blob/main/RELEASE.md)
- [Commits](anchore/sbom-action@7b36ad6...f8bdd1d)

---
updated-dependencies:
- dependency-name: anchore/sbom-action
  dependency-version: 0.20.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -73,7 +73,7 @@ jobs:
         token: ${{ secrets.CODECOV_TOKEN }}
 
     - name: Generate SBOM
-      uses: anchore/sbom-action@7b36ad622f042cab6f59a75c2ac24ccb256e9b45 # v0.20.4
+      uses: anchore/sbom-action@f8bdd1d8ac5e901a77a92f111440fdb1b593736b # v0.20.6
       with:
         artifact-name: build-${{ matrix.os-name }}.spdx.json
         output-file: ./artifacts/build.spdx.json