chore: remove main branch trigger from build workflow

.github/workflows/build.yml

@@ -2,8 +2,6 @@ name: Build Executables
 
 on:
   push:
-    branches:
-      - main
     tags:
       - 'v*'  # 添加标签触发条件，匹配 v1.0.0 这样的标签