getProgrammaticFuntionName typo in offapi/com/sun/star/sheet/XAddIn.idl

[Julien Nabet]

Hello,

I noticed a typo in function name "getProgrammaticFuntionName" instead 
of "getProgrammaticFunctionName".

(see 
https://opengrok.libreoffice.org/xref/core/offapi/com/sun/star/sheet/XAddIn.idl?r=2b383d19#51).

Usually I would have supposed we're stuck since it's in a public 
interface but the current implementations just return an empty OUString 
(unless I missed something) so wonder if it's really used.

Julien

PS : "Errare humanum est" but just wonder why these function names 
aren't double/triple-checked by at least 2 people before being published...