gateway: Ignore PRESENCES_REPLACE dispatch

This dispatch is undocumented and only used by user accounts.

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -1512,6 +1512,9 @@ namespace Discord.WebSocket
                             case "MESSAGE_ACK":
                                 await _gatewayLogger.DebugAsync("Ignored Dispatch (MESSAGE_ACK)").ConfigureAwait(false);
                                 break;
+                            case "PRESENCES_REPLACE":
+                                await _gatewayLogger.DebugAsync("Ignored Dispatch (PRESENCES_REPLACE)").ConfigureAwait(false);
+                                break;
                             case "USER_SETTINGS_UPDATE":
                                 await _gatewayLogger.DebugAsync("Ignored Dispatch (USER_SETTINGS_UPDATE)").ConfigureAwait(false);
                                 break;