chore(ci): add pnpm installation step in deploy workflow

Author: overtrue

.github/workflows/deploy.yml

@@ -34,6 +34,8 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Install dependencies
+        run: npm install -g pnpm
       - name: Install dependencies and build
         run: |
           pnpm install --no-frozen-lockfile