Fix dependency review workflow trigger

.github/workflows/dependency-review.yml

@@ -9,16 +9,7 @@
 # Public documentation: https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/about-dependency-review#dependency-review-enforcement
 name: 'Dependency Review'
 
-on:
-  push:
-    branches:
-      - main
-    paths-ignore:
-      - '**.md'
-  pull_request:
-    paths-ignore:
-      - '**.md'
-  workflow_dispatch:
+on: [pull_request]
 
 permissions:
   contents: read