update comment

processing/topics/helper/Sanitize.lua

@@ -2,7 +2,7 @@
 ---@param allowed table
 ---@param fallback? any
 ---@return any
--- makes sure that `value` is in the set `allowed`. Returns `default` if value is nil
+-- makes sure that `value` is in the set `allowed`. Returns `fallback` if value is nil
 function Sanitize(value, allowed, fallback)
   if value == nil then
     return fallback