Chat-Commands: add dt2 variations (#63)

Chat-Commands.md

@@ -107,7 +107,10 @@ Some boss names can be substituted for shorthand versions:
 `tob`, `theatre`, `verzik`, `verzik vitur`, `raids 2` -> `Theatre of Blood`    
 `tob cm`, `tob hm`, `htm` -> `Theatre of Blood: Hard Mode`  
 `toa` -> `Tombs of Amascut`  
-`toa expert`, `toa expert mode`, `tombs of amascut - expert` -> `Tombs of Amascut: Expert Mode`
+`toa expert`, `toa expert mode`, `tombs of amascut - expert` -> `Tombs of Amascut: Expert Mode`  
+`duke` -> `Duke Sucellus`  
+`the leviathan` -> `Leviathan`  
+`the whisperer` -> `Whisperer`  
 
 Note: if the chat commands for !kc do not work in-game, you first need to open up an in-game Ring of Wealth's boss kill log for RuneLite to register the kill counts.
 
@@ -157,6 +160,10 @@ Personal best times are stored for bosses and activities that keep personal best
 `!pb galvek`    
 `!pb gargs`, `!pb grotesque guardians`    
 `!pb hydra`, `!pb alchemical hydra`    
+`!pb duke`, `!pb duke sucellus`  
+`!pb leviathan`  
+`!pb vardorvis`  
+`!pb whisperer`  
 `!pb chambers`, `!pb cox`, `!pb cox cm`, `!pb cox cm [1-24]`  
 `!pb tob`, `!pb tob hard`, `!pb hmt [1-5]`  
 `!pb toa`, `!pb toa [1-8]`, `!pb toa expert`, `!pb toa expert [1-8]`