Fix syntax error in node-lint.yml

.github/workflows/node-lint.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        node: [ '10, '14' ]
+        node: [ '10', '14' ]
     steps:
       - name: Checkout
         uses: actions/checkout@v2