chore: update node version in docs

Author: marcossevilla

.github/workflows/site.yaml

@@ -21,7 +21,7 @@ jobs:
       - name: ⚙️ Setup Node
         uses: actions/setup-node@v5
         with:
-          node-version: 18.x
+          node-version: 20.x
           cache: npm
           cache-dependency-path: site/package-lock.json