Rename SDL_SetThreadPriority() to SDL_SetCurrentThreadPriority()

Fixes https://github.com/libsdl-org/SDL/issues/11055

src/camera/SDL_camera.c

@@ -785,7 +785,7 @@ void SDL_CameraThreadSetup(SDL_Camera *device)
     }*/
 #else
     // The camera capture is always a high priority thread
-    SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH);
+    SDL_SetCurrentThreadPriority(SDL_THREAD_PRIORITY_HIGH);
 #endif
 }