docs(Plugins): add Leaflet.Heightgraph (#6731)
docs(Plugins): add Leaflet.Heightgraph (#6731)

* Update plugins.md

* Update plugins.md

CapeSepias/Leaflet,Leaflet/Leaflet,Leaflet/Leaflet,CapeSepias/Leaflet,Leaflet/Leaflet,CapeSepias/Leaflet