[core] fix a bad typedef import

Author: velzie

lib/index.d.ts

@@ -4,7 +4,7 @@ import * as controller from "../dist/types/controller/index.ts";
 import * as worker from "../dist/types/worker/index.ts";
 import * as types from "../dist/types/types.ts";
 import * as frame from "../dist/types/controller/frame.ts";
-import { ScramjetClient as _ScramjetClient } from "../dist/types/client/client.ts";
+import { ScramjetClient as _ScramjetClient } from "../dist/types/client/index.ts";
 
 declare global {
 	function $scramjetLoadController(): typeof controller;