docs: update quick start

Author: pyjun01

docs/src/content/docs/docs/quick-start.mdx

@@ -4,7 +4,7 @@ title: Quick Start
 
 import { QuickStart } from '../../../components/QuickStart';
 
-- **You need to set `height` of map.** (see the example below)
+- **You need to set `height` of map**, or else it won't show up. (see the example below)
 - If you want to access to the <a href='https://developers.google.com/maps/documentation/javascript/reference/map#Map' target='_blank' rel='noreferrer'>map</a> instance, we recommend using `useMapContext` inside of `GoogleMap` component. (or you can using `ref`)
 - **Currently we don't support SSR. Please use it with CSR only.**