ci(docs[trigger]): Fix docs workflow to trigger on main branch

why: docs.yml triggered on master/init but the default branch is main,
     so docs were never published from main pushes
what:
- Change push trigger from master/init to main

Author: tony

.github/workflows/docs.yml

@@ -3,8 +3,7 @@ name: docs
 on:
   push:
     branches:
-      - master
-      - init
+      - main
 
 permissions:
   contents: read