Enhance documentation for calendar event functions by refining return types and parameter aliases

api/CalendarEventGetTextures.lua

@@ -1,11 +1,13 @@
 ---@diagnostic disable: missing-return, lowercase-global
 ---@meta
 
----@param eventType 2 
----@param 1  
----@param 2  
----@return string name 
----@return string icon 
----@return number expansion 
+---@alias eventType
+---| 1 Raid dungeon
+---| 2 Five-player dungeon
+
+---@param eventType eventType
+---@param expansion number Expansion to which the instance belongs; localized names can be found in the constants EXPANSION_NAME0, EXPANSION_NAME1, etc. (number)
+---@return string name
+---@return string icon #Unique part of the path to the instance's icon texture; for the full path, prepend with "Interface\LFGFrame\LFGIcon-"
 ---Returns a list of instance names and icons for dungeon or raid events
-function CalendarEventGetTextures(eventType, 1, 2) end
+function CalendarEventGetTextures(eventType, expansion) end