Update CI scripts

.github/workflows/ci-docs.yaml

@@ -3,19 +3,12 @@ on:
   push:
     branches:
       - main
-  pull_request_target:
+  pull_request:
 jobs:
   docs-build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-        if: github.event_name == 'push'
-        with:
-          ref: ${{ github.head_ref || github.ref_name }}
-      - uses: actions/checkout@v3
-        if: github.event_name == 'pull_request_target'
-        with:
-          ref: "refs/pull/${{ github.event.number }}/merge"
+      - uses: actions/checkout@v4
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with: