Include updated example of clustering using hooks (#823)

Include an example of clustering which loads/clusters remote data using hooks and modern React techniques.

README.md

@@ -137,7 +137,9 @@ Now every object on the map can be hovered (however, you can still use css hover
 * Example project:
 [main](http://google-map-react.github.io/google-map-react/map/main/) ([source](https://github.com/google-map-react/old-examples/blob/master/web/flux/components/examples/x_main/main_map_block.jsx)); [balderdash](http://google-map-react.github.io/google-map-react/map/balderdash/) (same source as main)
 
-* Clustering example (**new**: [source](https://github.com/istarkov/google-map-clustering-example))
+* Clustering example using Hooks (**new**: [source](https://github.com/leighhalliday/google-maps-clustering), [article](https://www.leighhalliday.com/google-maps-clustering)) [clustering-with-hooks](https://google-maps-clustering.netlify.com/)
+
+* Clustering example ([source](https://github.com/istarkov/google-map-clustering-example))
 [google-map-clustering-example](http://istarkov.github.io/google-map-clustering-example/)
 
 * How to render thousands of markers (**new**: [source](https://github.com/istarkov/google-map-thousands-markers))