use a more generic date time format for the generic log

BGS/GenericDiscordLog.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Globalization;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -8,7 +9,7 @@ namespace EliteBGS.BGS {
     public class GenericDiscordLog : IDiscordLogGenerator {
         private string FormatDate() {
             DateTime today = DateTime.Now;
-            return today.ToShortDateString();
+            return today.ToString("dd/MM/yyyy");
         }
 
         private string BuildCartoGraphics(Objective objective) {