💚 GHAでpnpmインストールされるようにした

Author: r-kataoka11

.github/workflows/update-session.yml

@@ -10,6 +10,11 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v5
 
+      - name: Set up pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          package_json_file: "package.json"
+
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with: