Fix example of creating wxUILocale in its documentation

There are several ways to do it, and it's not clear which one of them
should be illustrated here, but it should definitely be one that works.

Closes #22389.

interface/wx/uilocale.h

@@ -116,9 +116,10 @@ public:
 
         In the simplest case, this can be used as following:
         @code
-            const wxUILocale loc(wxLocaleIdent("fr"));
+            const wxUILocale loc(wxLocaleIdent().Language("fr"));
         @endcode
-        see wxLocaleIdent description for more details.
+        see wxLocaleIdent description for more details, including other ways of
+        specifying the locale.
 
         If @a localeId is not recognized or not supported, default ("C") locale
         is used instead. Additionally, if @a localeId is empty (see