build(deps): bump sigstore/cosign-installer from 3.3.0 to 3.4.0 (#240)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.3.0 to 3.4.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v3.3.0...v3.4.0)

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

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

.github/workflows/build.yml

@@ -48,7 +48,7 @@ jobs:
  uses: actions/checkout@v4
 
  # Confirm that cosign.pub matches SIGNING_SECRET
- - uses: sigstore/cosign-installer@v3.3.0
+ - uses: sigstore/cosign-installer@v3.4.0
  if: github.event_name != 'pull_request' && github.ref == 'refs/heads/live'
 
  - name: Check SIGNING_SECRET matches cosign.pub