reresolve hostname before reconnecting

src/main.cc

@@ -83,11 +83,11 @@ Bot::Bot(asio::any_io_executor executor, std::string_view name,
 asio::awaitable<void> Bot::Protocol() {
   asio::ip::tcp::resolver resolver{executor};
   asio::ip::tcp::resolver::query query{server, "4000"};
-  auto host = co_await resolver.async_resolve(query, asio::use_awaitable);
 
   while (true) {
     while (true) {
       try {
+        auto host = co_await resolver.async_resolve(query, asio::use_awaitable);
         co_await asio::async_connect(socket, host, asio::use_awaitable);
         break;
       } catch (std::exception &e) {