Bump sigstore/cosign-installer from 3.1.2 to 3.4.0 (#6853)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.1.2 to 3.4.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](11086d2504...e1523de757)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/docker.yaml

@@ -127,7 +127,7 @@ jobs:
         uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # pin@v3.0.0
       - name: Set up cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@11086d25041f77fe8fe7b9ea4e48e3b9192b8f19 # pin@v3.1.2
+        uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 # pin@v3.4.0
       - name: Check if Dockerhub login is required
         id: docker_login
         run: |