Merge pull request #24 from ballerina-platform/dev

Change master to main in yml

Author: kalaiyarasiganeshalingam

.github/workflows/pull-request.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
   push:
     branches-ignore:
-      - master
+      - main
 
 jobs:
   ubuntu-build: