Unneeded build event (#2158)

Build() at the end of the command creation isn't needed. The build is done on line 34.

Co-authored-by: Cookiezzz <Cookiezzz@users.noreply.github.com>

docs/guides/int_basics/application-commands/slash-commands/choice-slash-command.md

@@ -27,7 +27,7 @@ private async Task Client_Ready()
             .AddChoice("Lovely", 4)
             .AddChoice("Excellent!", 5)
             .WithType(ApplicationCommandOptionType.Integer)
-        ).Build();
+        );
 
     try
     {