use setup-node's own cache directive instead of separate action

README.md

@@ -263,15 +263,13 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: '14'
+          node-version: '16'
-
+          cache: 'npm'
-      - name: Cache dependencies
+          # The action defaults to search for the dependency file (package-lock.json,
-        uses: actions/cache@v2
+          # npm-shrinkwrap.json or yarn.lock) in the repository root, and uses its
-        with:
+          # hash as a part of the cache key.
-          path: ~/.npm
+          # https://github.com/actions/setup-node/blob/main/docs/advanced-usage.md#caching-packages-data
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          cache-dependency-path: '**/package-lock.json'
-          restore-keys: |
-            ${{ runner.os }}-node-
 
       - run: npm ci
       - run: hugo --minify