chore(deps): bump sigstore/cosign-installer (aquasecurity#4910)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from ef0e9691595ea19ec990a46b1a591dcafe568f34 to a5d81fb6bdbcbb3d239e864d6552820420254494.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@ef0e969...a5d81fb)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-type: direct:production
...

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

.github/workflows/reusable-release.yaml

@@ -27,7 +27,7 @@ jobs:
       contents: read  # Not required for public repositories, but for clarity
     steps:
       - name: Cosign install
-        uses: sigstore/cosign-installer@ef0e9691595ea19ec990a46b1a591dcafe568f34
+        uses: sigstore/cosign-installer@a5d81fb6bdbcbb3d239e864d6552820420254494
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2