chore: changed how PRs trigger build pipeline

.github/workflows/build.yml

@@ -1,11 +1,9 @@
 name: "build"
 on:
   push:
-    branches:
-      - "**"
   pull_request:
     branches:
-      - "main"
+      - "**"
 
 # This is the example from the readme.
 # On each push to the `main` branch it will create or update a GitHub build, build your app, and upload the artifacts to the build.