[github] bump cosign to 2.2.3 (#724)

Author: pducolin

.github/workflows/docker-publish.yml

@@ -77,7 +77,7 @@ jobs:
         if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 #3.4.0
         with:
-          cosign-release: 'v1.13.1'
+          cosign-release: 'v2.2.3'
 
 
       # Workaround: https://github.com/docker/build-push-action/issues/461