chore: bump ci to v4

Author: fankes

.github/workflows/docs-deploy.yml

@@ -16,11 +16,11 @@ jobs:
     if: ${{ success() }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Setup Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: 18
       - name: Build VuePress site