Sync SDL3 wiki -> header

[ci skip]

include/SDL3/SDL_stdinc.h

@@ -2667,7 +2667,7 @@ extern SDL_DECLSPEC void * SDLCALL SDL_memset4(void *dst, Uint32 val, size_t dwo
  * \since This macro is available since SDL 3.2.0.
  *
  * \sa SDL_zero
- * \sa SDL_zeroa
+ * \sa SDL_zerop
  */
 #define SDL_zeroa(x) SDL_memset((x), 0, sizeof((x)))