docs: 修正 #65 中 @kuchaguangjie 提到的 WebSocket 例子参数错误的文档

README.md

@@ -78,7 +78,7 @@ import (
 
 func main() {
 	srv := server.New(server.NetworkWebsocket)
-	srv.RegConnectionReceivePacketEvent(func(srv *server.Server, conn *server.Conn, packet server.Packet) {
+	srv.RegConnectionReceivePacketEvent(func(srv *server.Server, conn *server.Conn, packet []byte) {
 		conn.Write(packet)
 	})
 	if err := srv.Run(":9999"); err != nil {