Sync SDL3 wiki -> header

[ci skip]

Author: SDLWikiBot

include/SDL3/SDL_surface.h

@@ -32,7 +32,8 @@
  * There is also a simple .bmp loader, SDL_LoadBMP(). SDL itself does not
  * provide loaders for various other file formats, but there are several
  * excellent external libraries that do, including its own satellite library,
- * SDL_image:
+ * [SDL_image](https://wiki.libsdl.org/SDL3_image)
+ * :
  *
  * https://github.com/libsdl-org/SDL_image
  */