run ci on PRs

Author: Ahmad

.github/workflows/ci.yml

@@ -1,7 +1,8 @@
 on:
   push:
-    branches:
-      - main
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
 env:
   # Stop wasting time caching packages
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true