Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) and [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action).


Updates `sigstore/cosign-installer` from 3.6.0 to 3.7.0
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@4959ce0...dc72c7d)

Updates `docker/setup-buildx-action` from 3.6.1 to 3.7.1
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@988b5a0...c47758b)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

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

.github/workflows/docker-publish.yml

@@ -41,15 +41,15 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@4959ce089c160fddf62f7b42464195ba1a56d382 #v3.6.0
+        uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da #v3.7.0
         with:
           cosign-release: 'v2.2.3'
 
       # Set up BuildKit Docker container builder to be able to build
       # multi-platform images and export cache
       # https://github.com/docker/setup-buildx-action
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
+        uses: docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349 # v3.7.1
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action