use pnpm instead of yarn

.github/workflows/depoly.yml

@@ -18,7 +18,7 @@ jobs:
       id: cache
       with:
         path: node_modules
-        key: ${{ runner.os }}-node-${{ hashFiles('**/yarn.lock') }}
+        key: ${{ runner.os }}-node-${{ hashFiles('**/pnpm-lock.yaml') }}
         restore-keys: |
           ${{ runner.os }}-node-
     - run: 'curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -'
@@ -27,7 +27,7 @@ jobs:
         
     - name: Install Dependencies
       if: steps.cache.outputs.cache-hit != 'true'
-      run: yarn
+      run: pnpm install
     
     # Deploy hexo blog website.
     - name: Deploy