Update assailum to 3.21 (#5879)

* Update assailum to 3.21

* Fix typo

Author: QuickStick123

src/Data/Uniques/helmet.lua

@@ -172,9 +172,12 @@ You cannot be Hindered
 ]],[[
 Assailum
 Sinner Tricorne
+Variant: Pre 3.21.0
+Variant: Current
 Requires Level 64, 138 Dex
 Implicits: 0
-Grants Level 20 Snipe Skill
+{variant:1}Grants Level 20 Snipe Skill
+{variant:2}Grants Level 30 Snipe Skill
 Socketed Non-Channelling Bow Skills are Triggered by Snipe
 Socketed Triggered Bow Skills deal 40% less Damage
 +(350-500) to Accuracy Rating