ci(github): 修改触发事件类型

Author: conifercone

.github/workflows/dependency-submission.yml

@@ -1,6 +1,12 @@
 name: Dependency Submission
 
-on: [ push ]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 permissions:
   contents: write