w32--os-description: Fix previous change

* lisp/w32-fns.el (w32--os-description): Fix inadvertant "o" added
to the end of the function name in the previous patch (bug#35807).

lisp/w32-fns.el

@@ -308,7 +308,7 @@ names."
 (declare-function w32-version "w32-win" ())
 (declare-function w32-read-registry "w32fns" (root key name))
 
-(defun w32--os-descriptiono ()
+(defun w32--os-description ()
   "Return a string describing the underlying OS and its version."
   (let* ((w32ver (car (w32-version)))
          (w9x-p (< w32ver 5))