fix reference to lockfile

Author: koddsson

.github/workflows/nodejs.yml

@@ -17,7 +17,7 @@ jobs:
       uses: actions/cache@v2
       with:
         path: ~/.npm
-        key: ${{ runner.os }}-node-${{ hashFiles('**/yarn.lock') }}
+        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
         restore-keys: |
           ${{ runner.os }}-node-
     - name: Use Node.js 13.11.0