Clean up Circle CI configs; Fix and test Github Action workflow

.github/pull_request_template.md

@@ -1,7 +1,5 @@
-Important: DO NOT REPORT SECURITY ISSUES DIRECTLY ON GITHUB.  
-For reporting security issues and contributing security fixes,  
-please, email security@linkedin.com instead, as described in  
-the contribution guidelines.
+## Summary
 
-Please, take a minute to review the contribution guidelines at:  
-https://github.com/linkedin/Brooklin/blob/master/CONTRIBUTING.md
+
+
+## Testing Done

.github/workflows/build.yml

@@ -2,9 +2,9 @@ name: Build
 
 on:
   push:
-    branches: [main]
+    branches: [master]
   pull_request:
-    branches: [main]
+    branches: [master]
 
 jobs:
   build:
@@ -21,7 +21,7 @@ jobs:
           java-version: '8'
 
       - name: Make build.sh executable
-        run: chmod +x ./build.sh
+        run: chmod +x ./.github/scripts/build.sh
 
       - name: Run build script
         run: ./.github/scripts/build.sh