Fix latency reporting to Uptime Kuma

Author: Erisa

Events/HeartbeatEvent.cs

@@ -6,7 +6,7 @@ public class HeartbeatEvent
     {
         public static async Task OnHeartbeat(IGatewayClient client)
         {
-            Program.discord.Logger.LogDebug("Heartbeat ping: {ping}", client.Ping.TotalMicroseconds);
+            Program.discord.Logger.LogDebug("Heartbeat ping: {ping}", client.Ping.TotalMilliseconds);
             if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("UPTIME_KUMA_PUSH_URL")) && client.IsConnected)
             {
                 HttpResponseMessage response;