Renamed SDL events for clarity

Fixes https://github.com/libsdl-org/SDL/issues/6877

include/SDL3/SDL_locale.h

@@ -79,7 +79,7 @@ typedef struct SDL_Locale
  * This might be a "slow" call that has to query the operating system. It's
  * best to ask for this once and save the results. However, this list can
  * change, usually because the user has changed a system preference outside of
- * your program; SDL will send an SDL_LOCALECHANGED event in this case, if
+ * your program; SDL will send an SDL_EVENT_LOCALE_CHANGED event in this case, if
  * possible, and you can call this function again to get an updated copy of
  * preferred locales.
  *