CI: modify to pnpm to resolve CI issues

Author: BaiHLiu

.github/workflows/static-site.yml

@@ -24,27 +24,25 @@ jobs:
       - name: Check Time
         run: date
 
+      - uses: pnpm/action-setup@v4
+        with:
+          version: 7
+
       - uses: actions/setup-node@v4
         with:
           node-version: '16'
+          cache: 'pnpm'
 
-      - name: Check yarn / node version
+      - name: Check pnpm / node version
         run: |
-          echo "yarn version $(yarn --version)"
+          echo "pnpm version $(pnpm --version)"
           echo "node version $(node -v)"
 
-      - name: Cache dependencies
-        uses: actions/cache@v3
-        with:
-          path: ~/.npm
-          key: npm-${{ hashFiles('package-lock.json') }}
-          restore-keys: npm-
-
       - name: Install Dependencies
-        run: yarn install
+        run: pnpm install --frozen-lockfile
 
       - name: Build Site
-        run: yarn build
+        run: pnpm build
 
       - name: Deploy to GitHub Pages
         uses: peaceiris/actions-gh-pages@v3