Updating example projects for use of SingleThread/ThreadPool

Examples/DependencyInjection/Program.cs

@@ -25,6 +25,7 @@ namespace DependencyInjection
                                     .NoCommands()
                                     .NoSerialization()
                                     .DefaultLanguage()
+                                    .UseSingleThread()
                                     .Build();
 
             await bot.Start();

Examples/EFCoreBot/Program.cs

@@ -18,6 +18,7 @@ var bot = BotBaseBuilder.Create()
                         .NoCommands()
                         .NoSerialization()
                         .DefaultLanguage()
+                        .UseSingleThread()
                         .Build();
 
 await bot.Start();

Examples/InlineAndReplyCombination/Program.cs

@@ -21,6 +21,7 @@ namespace InlineAndReplyCombination
                     .DefaultCommands()
                     .UseJSON(Path.Combine(Directory.GetCurrentDirectory(), "states.json"))
                     .UseEnglish()
+                    .UseSingleThread()
                     .Build();