Bump sigstore/cosign-installer from 3.1.1 to 3.1.2 (#127)

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

action.yml

@@ -20,7 +20,7 @@ inputs:
 runs:
   using: composite
   steps:
-    - uses: sigstore/cosign-installer@6e04d228eb30da1757ee4e1dd75a0ec73a653e06 # v3.1.1
+    - uses: sigstore/cosign-installer@11086d25041f77fe8fe7b9ea4e48e3b9192b8f19 # v3.1.2
     - run: |
         cd $GITHUB_ACTION_PATH \
         && ./ct.sh \