Sync SDL3 wiki -> header

[ci skip]

include/SDL3/SDL_gpu.h

@@ -130,7 +130,8 @@
  * It is optimal for apps to pre-compile the shader formats they might use,
  * but for ease of use SDL provides a separate project,
  * [SDL_shadercross](https://github.com/libsdl-org/SDL_shadercross)
- * , for performing runtime shader cross-compilation.
+ * , for performing runtime shader cross-compilation. It also has a CLI
+ * interface for offline precompilation as well.
  *
  * This is an extremely quick overview that leaves out several important
  * details. Already, though, one can see that GPU programming can be quite