fix: pnpm/action-setupをcorepackで置き換え (#72)

* fix: corepackとsetup-nodeを使用する

* fix: corepackの設定を追加

.github/workflows/ci.yml

@@ -11,19 +11,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - run: corepack enable
       - name: Setup Nodejs v20
         uses: actions/setup-node@v4
-
-      - uses: pnpm/action-setup@v2
-        with:
-          version: 9
-
-      - name: Cache
-        uses: actions/cache@v4
         with:
-          path: ~/.cache/install/cache
-          key: ${{ runner.os }}-pnpm-${{ hashFiles('**/pnpm-lock.yaml') }}
-          restore-keys: ${{ runner.os }}-pnpm-
+          node-version: 20
+          cache: "pnpm"
 
       - name: Install packages
         run: pnpm i --frozen-lockfile

package.json

@@ -19,5 +19,6 @@
   "version": "0.0.1",
   "workspaces": [
     "packages/*"
-  ]
+  ],
+  "packageManager": "pnpm@9.3.0"
 }