ci: use pnpm setup

Author: YunYouJun

.github/workflows/gh-pages.yml

@@ -8,17 +8,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+
+      - name: Install Dependencies by pnpm
+        uses: pnpm/action-setup@v2
         with:
-          submodules: true
+          version: 6
+          run_install: true
 
       - name: Setup Node
         uses: actions/setup-node@v2
         with:
           node-version: "14.x"
 
-      - name: Install Dependencies
-        run: npm install
-
       - name: Build
         run: npm run build
         env: