build(deps): bump the ci group with 3 updates

Bumps the ci group with 3 updates: [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action), [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) and [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request).


Updates `docker/setup-buildx-action` from 3.2.0 to 3.3.0
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](2b51285047...d70bba72b1)

Updates `sigstore/cosign-installer` from 3.4.0 to 3.5.0
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](e1523de757...59acb6260d)

Updates `peter-evans/create-pull-request` from 6.0.2 to 6.0.3
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](70a41aba78...c55203cfde)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: ci
- dependency-name: peter-evans/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: ci
...

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

.github/workflows/update.yaml

@@ -84,7 +84,7 @@ jobs:
 
       - name: Create Pull Request
         id: cpr
-        uses: peter-evans/create-pull-request@70a41aba780001da0a30141984ae2a0c95d8704e # v6.0.2
+        uses: peter-evans/create-pull-request@c55203cfde3e5c11a452d352b4393e68b85b4533 # v6.0.3
         with:
           token: ${{ secrets.BOT_GITHUB_TOKEN }}
           commit-message: |