ci: use built-in cache action

Author: nikku

.github/workflows/CI.yml

@@ -17,15 +17,7 @@ jobs:
       uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
-    - name: Cache Node.js modules
-      uses: actions/cache@v2
-      with:
-        # npm cache files are stored in `~/.npm` on Linux/macOS
-        path: ~/.npm
-        key: ${{ runner.OS }}-node-${{ hashFiles('**/package-lock.json') }}
-        restore-keys: |
-          ${{ runner.OS }}-node-
-          ${{ runner.OS }}-
+        cache: 'npm'
     - name: Install dependencies
       run: npm ci
     - name: Build