ci: never cancel workflow on default branch

Author: ryancyq

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ permissions:
 
 concurrency:
   group: test-action
-  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+  cancel-in-progress: ${{ github.ref == 'refs/heads/main' }}
 
 jobs:
   test-vitest: