manually specific cache dep path

.github/workflows/deploy-docs.yml

@@ -25,6 +25,7 @@ jobs:
         with:
           node-version: 16.x
           cache: 'npm'
+          cache-dependency-path: './docs/package-lock.json'
       - name: Install dependencies
         run: npm install --frozen-lockfile --non-interactive
       - name: Build