Bump sigstore/cosign-installer from 3.1.1 to 3.1.2

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@6e04d22...11086d2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-and-sign-image.yml

@@ -28,7 +28,7 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install cosign
-        uses: sigstore/cosign-installer@6e04d228eb30da1757ee4e1dd75a0ec73a653e06 #v3.0.2
+        uses: sigstore/cosign-installer@11086d25041f77fe8fe7b9ea4e48e3b9192b8f19 #v3.0.2
         with:
           cosign-release: 'v1.13.1'