update: README.md plugin list.

Signed-off-by: wgj <wgj>

Author: wgj

README.md

@@ -78,12 +78,12 @@
 
 ## Plugins
 
+- [x] [rc-leaflet-heat](https://github.com/Coder-JJ/rc-leaflet-heat)
+
 - [x] [rc-leaflet-drawing](https://github.com/Coder-JJ/rc-leaflet-drawing)
 
 - [ ] rc-leaflet-cluster-point
 
-- [ ] rc-leaflet-heatmap
-
 - [ ] rc-leaflet-routing
 
 ## Configuration