ci: 更新 GitHub Actions 工作流

- 在 deploy.yml 中添加 pnpm 缓存以提高构建效率

Author: molanp

.github/workflows/deploy.yml

@@ -37,6 +37,7 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: 22
+          cache: pnpm
       - name: Setup Pages
         uses: actions/configure-pages@v4
       - name: Install dependencies