Update main.yml

Author: Jason Mobarak

.github/workflows/main.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches:
       - 'main'
-      - 'swift-toolbox-v.*'
+      - 'swift-toolbox-v4.0.0-branch'
     tags:
       - '[0-9]+.[0-9]+.[0-9]+*'
       - 'v[0-9]+.[0-9]+.[0-9]+*'