feat(ark): Add Genesis 2 (#3678)

Add the Genesis 2 DLC map name

Co-authored-by: Daniel Gibbs <me@danielgibbs.co.uk>

lgsm/config-default/config-lgsm/arkserver/_default.cfg

@@ -13,7 +13,7 @@ ip="0.0.0.0"
 port="7777"
 queryport="27015"
 rconport="27020"
-# Default Map: TheIsland, Ragnarok, CrystalIsles, Aberration_P, ScorchedEarth_P, TheCenter, Extinction, Valguero_P, Genesis
+# Default Map: TheIsland, Ragnarok, CrystalIsles, Aberration_P, ScorchedEarth_P, TheCenter, Extinction, Valguero_P, Genesis, Gen2
 defaultmap="TheIsland"
 altsavedirectoryname="${defaultmap}"
 maxplayers="70"