Merge pull request #4 from babariviere/dependabot/github_actions/sigstore/cosign-installer-3.7.0

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.6.0 to 3.7.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](https://github.com/sigstore/cosign-installer/compare/v3.6.0...v3.7.0)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build-boxkit.yml

@@ -84,7 +84,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
             
       # Sign container
-      - uses: sigstore/cosign-installer@v3.6.0
+      - uses: sigstore/cosign-installer@v3.7.0
 
       - name: Sign container image
         if: github.event_name != 'pull_request'