Fix Spirit per Level rune not working (#2268)

We didn't have parsing for the levels mod so it wasn't working

Co-authored-by: LocalIdentity <localidentity2@gmail.com>

Author: LocalIdentity

src/Modules/ModParser.lua

@@ -1472,6 +1472,7 @@ local modTagList = {
 	["per level"] = { tag = { type = "Multiplier", var = "Level" } },
 	["per player level"] = { tag = { type = "Multiplier", var = "Level" } },
 	["per (%d+) player levels"] = function(num) return { tag = { type = "Multiplier", var = "Level", div = num } } end,
+	["per (%d+) levels"] = function(num) return { tag = { type = "Multiplier", var = "Level", div = num } } end,
 	["per defiance"] = { tag = { type = "Multiplier", var = "Defiance" } },
 	["per (%d+)%% (%a+) effect on enemy"] = function(num, _, effectName) return { tag = { type = "Multiplier", var = firstToUpper(effectName) .. "Effect", div = num, actor = "enemy" } } end,
 	["per socketed rune or soul core"] = { tag = { type = "Multiplier", var = "RunesSocketedIn{SlotName}" } },