Update config.toml

Add more prominent link for Helium Miner

Author: Xykon

config.toml

@@ -16,6 +16,12 @@ theme = "doc-theme"
  identifier = "products"
  weight = 30
 
+[[menu.main]]
+ name = "Pycom Helium Miner"
+ url = "/gettingstarted/registration/lora/helium_hotspot_registration/"
+ identifier = "helium"
+ weight = 5
+
 # *** Getting Started
 [[menu.main]]
  name = "Getting Started"