use invariant culture for month names

BGS/NonaDiscordLog.cs

@@ -2,11 +2,13 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Globalization;
 using EDJournal;
 
 namespace EliteBGS.BGS {
     public class NonaDiscordLog : IDiscordLogGenerator {
         private string FormatDate() {
+            CultureInfo cultureInfo = CultureInfo.InvariantCulture;
             StringBuilder date = new StringBuilder();
             DateTime today = DateTime.Now;
             string suffix;
@@ -20,7 +22,8 @@ namespace EliteBGS.BGS {
             }
 
             date.AppendFormat("{0} {1}{2}, {3}",
-                today.ToString("MMMM"), today.Day, suffix,
+                cultureInfo.DateTimeFormat.GetMonthName(today.Month), 
+                today.Day, suffix,
                 today.Year + EliteDangerous.YearOffset
                 );