Add pull-requests write permission to build job. (github action)

This aims to resolve : Error: Resource not accessible by integration

.github/workflows/main.yml

@@ -8,7 +8,11 @@ on:
     branches: [ "master" ]
 
 jobs:
-  build: 
+  build:
+    # To be able to write/remove comments on PR  
+    permissions:  
+      pull-requests: write
+
     name : Code Check
     runs-on: ubuntu-latest