Update cosign

closes #13

Author: jschirrmacher

.github/workflows/build-and-publish.yml

@@ -52,10 +52,7 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@f3c664df7af409cb4873aa5068053ba9d61a57b6 #v2.6.0
-        with:
-          cosign-release: 'v1.13.1'
-
+        uses: sigstore/cosign-installer@v3.1.1
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx