Ensure that all functions that follow the SDL_GetStringRule return temporary memory

include/SDL3/SDL_platform.h

@@ -48,8 +48,6 @@ extern "C" {
  * - "iOS"
  * - "Android"
  *
- * The returned string follows the SDL_GetStringRule, and will be automatically freed later.
- *
  * \returns the name of the platform. If the correct platform name is not
  *          available, returns a string beginning with the text "Unknown".
  *