use pnpm here

Signed-off-by: Ayase Minori <[email protected]>

.github/workflows/ci.yml

@@ -15,12 +15,15 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
-
+
+      - name: Set up pnpm
+        uses: pnpm/action-setup@v2
+
       - name: Set up Node
         uses: actions/setup-node@v2
         with:
-          node-version: 18
-          cache: 'pnpm'
+          node-version: '18'
+          cache:'pnpm'
 
       - name: Install dependencies
         run: pnpm install