chore: bump sigstore/cosign-installer from 3.4.0 to 4.0.0 (#14)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.4.0 to 4.0.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.4.0...v4.0.0)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: addetz <[email protected]>

Author: dependabot[bot]

.github/workflows/release.yaml

@@ -62,7 +62,7 @@ jobs:
           push: true
           tags: ghcr.io/${{ github.repository }}:${{steps.version.outputs.VERSION}}
 
-      - uses: sigstore/cosign-installer@v3.4.0
+      - uses: sigstore/cosign-installer@v4.0.0
 
       - name: Image Signing
         run: |