chore(deps): bump sigstore/cosign-installer from 4.1.1 to 4.1.2 (#6325)

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](https://github.com/sigstore/cosign-installer/compare/cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003...6f9f17788090df1f26f669e9d70d6ae9567deba6)

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

.github/workflows/helm.yml

@@ -132,7 +132,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install cosign
-        uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003 # v4.1.1
+        uses: sigstore/cosign-installer@6f9f17788090df1f26f669e9d70d6ae9567deba6 # v4.1.2
         with:
           cosign-release: 'v3.0.2'