ci(deps): bump sigstore/cosign-installer from 4.1.1 to 4.1.2

Bumps [sigstore/cosign-installer](https://github.com/sigstore/cosign-installer) from 4.1.1 to 4.1.2.
- [Release notes](https://github.com/sigstore/cosign-installer/releases)
- [Commits](sigstore/cosign-installer@cad07c2...6f9f177)

---
updated-dependencies:
- dependency-name: sigstore/cosign-installer
  dependency-version: 4.1.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -415,7 +415,7 @@ jobs:
       # Sign by digest (not tag) to guarantee we sign exactly what was pushed.
       - name: Install Cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003 # v4.1.1
+        uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2
 
       - name: Sign container image with Cosign
         if: github.event_name != 'pull_request'
@@ -871,7 +871,7 @@ jobs:
           if-no-files-found: error
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003 # v4.1.1
+        uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2
 
       - name: Log in to GHCR (for cosign attest)
         uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0