Upgrade actions/setup-node to v2

Author: xavierfoucrier

.github/workflows/deploy-docs.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
 
       - name: Install dependencies
         run: npm ci