[OpenBIOS] corrections to vocabulary.fs

[Programmingkid]

I found a few documentation mistakes in the vocabulary.fs file. In the comment section of get-order and set-order, their comments are incorrect. For get-order the comment should be ( -- widn .. wid1 n). For set-order the comment should be ( widn .. wid1 n -- ). This page is where I found the correct comments: http://lars.nocrew.org/dpans/dpans16.htm#16.6.1.2197