fix: adds newline before start region tag (#693)

region tag is being stripped from output. This is a "hail Mary" to see if adding a space prevents that.

Author: willum070

samples/deckgl-heatmap/index.ts

@@ -3,6 +3,7 @@
  * Copyright 2025 Google LLC. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
+
 /* [START maps_deckgl_heatmap] */
 // Declare global namespace for Deck.gl to satisfy TypeScript compiler
 declare namespace deck {
@@ -195,4 +196,4 @@ async function initMap(): Promise<void> {
 }
 
 initMap();
-/* [END maps_deckgl_heatmap] */
+/* [END maps_deckgl_heatmap] */