Bump sigstore/cosign-installer from 3.1.2 to 3.2.0

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.1.2 to 3.2.0.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@11086d2...1fc5bd3)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/docker.yaml

@@ -40,7 +40,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@11086d25041f77fe8fe7b9ea4e48e3b9192b8f19
+        uses: sigstore/cosign-installer@1fc5bd396d372bee37d608f955b336615edf79c8
 
 
       # Workaround: https://github.com/docker/build-push-action/issues/461