i: Update Grid UI CI from Node.js 18 to 20 for type compatibility

Author: harsha509

.github/workflows/ci-grid-ui.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
           cache: 'npm'
           cache-dependency-path: 'javascript/grid-ui/package.json'