Update .github/workflows/build_workflow.yml

Co-authored-by: kathleen-deriv <[email protected]>

Author: chylli-deriv

.github/workflows/build_workflow.yml

@@ -2,6 +2,8 @@ name: Build workflow
 run-name: Build workflow
 on:
   push:
+    branches:
+      - '!master'
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true