fix(geocoder): add styles for example (#2521)

Co-authored-by: Xiaoji Chen <Pessimistress@users.noreply.github.com>
Co-authored-by: Chris Gervang <chrisgervang@users.noreply.github.com>

Author: 3 people

examples/mapbox/geocoder/src/geocoder-control.tsx

@@ -3,6 +3,8 @@ import {useState} from 'react';
 import {useControl, Marker, MarkerProps, ControlPosition} from 'react-map-gl/mapbox';
 import MapboxGeocoder, {GeocoderOptions} from '@mapbox/mapbox-gl-geocoder';
 
+import '@mapbox/mapbox-gl-geocoder/dist/mapbox-gl-geocoder.css';
+
 type GeocoderControlProps = Omit<GeocoderOptions, 'accessToken' | 'mapboxgl' | 'marker'> & {
   mapboxAccessToken: string;
   marker?: boolean | Omit<MarkerProps, 'longitude' | 'latitude'>;