Update actions/setup-node action to v3

Author: renovate-bot

.github/workflows/docusaurus.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v2
       # Node is required for npm
       - name: Set up Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: "16"
       # Install and build Docusaurus website