Update index.ts (#327)

Adds a comment to try to kick off the dist build (not sure why it skipped last time).

Author: willum070

samples/3d-model/index.ts

@@ -7,6 +7,7 @@
 // @ts-nocheck
 // [START maps_3d_model]
 async function init() {
+    // Import the needed libraries.
     const { Map3DElement, Model3DElement } = await google.maps.importLibrary("maps3d");
 
     const map = new Map3DElement({