ci: use node 20

Author: barmac

.github/workflows/CI.yml

@@ -10,7 +10,7 @@ jobs:
     - name: Use Node.js
       uses: actions/setup-node@v4
       with:
-        node-version: 16
+        node-version: 20
         cache: 'npm'
     - name: Install dependencies
       run: npm ci