ci: run Build workflow on pushes to master (#1224)

Co-authored-by: Claude <noreply@anthropic.com>

Author: Naturalclar

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ name: Build
 on:
   push:
     branches:
-      - main
+      - master
   pull_request:
   workflow_dispatch: