Merge pull request #18 from githubcdr/renovate/sigstore-cosign-installer-3.x

Update sigstore/cosign-installer action to v3

Author: githubcdr

.github/workflows/docker-publish.yml

@@ -41,7 +41,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@c85d0e205a72a294fe064f618a87dbac13084086 # v2.8.1
+        uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 # v3.4.0
         with:
           cosign-release: 'v1.11.0'