.wikiheader-options: Treat SDL int types (Uint64, etc) as API prefixes.

This makes any reference to them in the docs link to their wiki pages.

.wikiheaders-options

@@ -3,7 +3,7 @@ projectshortname = SDL
 incsubdir = include/SDL3
 wikisubdir =
 readmesubdir = docs
-apiprefixregex = (SDL_|SDLK_)
+apiprefixregex = (SDL_|SDLK_|[US]int\d+)
 mainincludefname = SDL3/SDL.h
 versionfname = include/SDL3/SDL_version.h
 versionmajorregex = \A\#define\s+SDL_MAJOR_VERSION\s+(\d+)\Z