bump cosign to v2.4.0

Author: nickspizzas

.github/workflows/docker-publish.yml

@@ -41,9 +41,9 @@ jobs:
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
         if: github.event_name != 'pull_request'
-        uses: sigstore/cosign-installer@6e04d228eb30da1757ee4e1dd75a0ec73a653e06 #v3.1.1
+        uses: sigstore/cosign-installer@v3.6.0
         with:
-          cosign-release: 'v2.1.1'
+          cosign-release: 'v2.4.0'
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx