refactor: rename page name

Author: KatoakDR

electron/renderer/pages/dnd.tsx

@@ -0,0 +1,7 @@
+import { Grid } from '../components/grid/grid';
+
+const GridPage: React.FC = (): JSX.Element => {
+  return <Grid />;
+};
+
+export default GridPage;

electron/renderer/pages/grid.tsx

@@ -23,7 +23,7 @@ const HomePage: React.FC = (): JSX.Element => {
       </p>
 
       <p>
-        <Link href="/dnd">Drag-n-Drop</Link>
+        <Link href="/grid">Grid</Link>
       </p>
 
       <p>