Fix outdated references to SDL symbols in docs. Fixes #11503

include/SDL3/SDL_hints.h

@@ -1034,7 +1034,7 @@ extern "C" {
  * force a specific target, such as "direct3d11" if, say, your hardware
  * supports D3D12 but want to try using D3D11 instead.
  *
- * This hint should be set before SDL_GPUSelectBackend() is called.
+ * This hint should be set before any GPU functions are called.
  *
  * \since This hint is available since SDL 3.1.3.
  */