Run builds on PRs on 3.0.x-fixes (#419)

Author: coheigea

.github/workflows/pull-request-build.yaml

@@ -2,7 +2,7 @@ name: "Build and Test"
 
 on:
   pull_request:
-    branches: ['main']
+    branches: ['main', '3.0.x-fixes']
 
 permissions:
   contents: read