(websocket) add a positive number to the heartbeat message sent, incremented each time the heartbeat is sent

ixbots/ixbots/IXCobraToSentryBot.cpp

@@ -237,7 +237,7 @@ namespace ix
             }
             else if (event->type == ix::CobraEventType::Pong)
             {
-                spdlog::info("Received websocket pong");
+                spdlog::info("Received websocket pong: {}", event->errMsg);
             }
             else if (event->type == ix::CobraEventType::HandshakeError)
             {