chore: prevent two concurrent running release workflows

Author: Conduitry

.github/workflows/release.yml

@@ -5,6 +5,11 @@ on:
     branches:
       - main
 
+concurrency:
+  # prevent two release workflows from running at once
+  # race conditions here can result in releases failing
+  group: ${{ github.workflow }}
+
 permissions: {}
 jobs:
   release: