chore(deps): bump sigstore/cosign-installer from 2.3.0 to 3.8.1 (#314)

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 2.3.0 to 3.8.1.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@v2.3.0...v3.8.1)

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

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

.github/workflows/docker.yml

@@ -30,7 +30,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
       -
         name: Install Cosign
-        uses: sigstore/cosign-installer@v2.3.0
+        uses: sigstore/cosign-installer@v3.8.1
       -
         name: Login to GHCR
         uses: docker/login-action@v3

.github/workflows/releaser.yml

@@ -46,7 +46,7 @@ jobs:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
       -
         name: Install Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@v3.8.1
       -
         name: Import Code-Signing Certificates
         uses: Apple-Actions/import-codesign-certs@v3