[ci] Update actions/setup-node action to v2

Author: lpinca

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
           - 16
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
       - run: npm install