Clarified device ID documentation

Fixes https://github.com/libsdl-org/SDL/issues/10558

include/SDL3/SDL_keyboard.h

@@ -45,8 +45,7 @@ extern "C" {
  *
  * If the keyboard is disconnected and reconnected, it will get a new ID.
  *
- * The ID value starts at 1 and increments from there. The value 0 is an
- * invalid ID.
+ * The value 0 is an invalid ID.
  *
  * \since This datatype is available since SDL 3.0.0.
  */