[whatwg] Probable typo in section 5.2.2.

[Øistein E . Andersen]

In section 5.2.2., `chickenkïwi.soup' (with diaeresis) appears twice (once 
encoded as chickenk%C3%AFwi.soup), as does `chickenkiwi.soup' (without 
diaeresis).

-- 
Øistein E. Andersen