Changing .dcr description

It was confusing some people

NadekoBot/Modules/Administration/Commands/CustomReactionsCommands.cs

@@ -145,7 +145,7 @@ namespace NadekoBot.Modules.Administration.Commands
 
             cgb.CreateCommand(Prefix + "delcustreact")
                 .Alias(Prefix + "dcr")
-                .Description($"Deletes a custom reaction with given name (and index). **Bot Owner Only.**| `{Prefix}dcr index`")
+                .Description($"Deletes a custom reaction with given name (and optional index). **Bot Owner Only.**| `{Prefix}dcr Reaction Name`")
                 .Parameter("name", ParameterType.Required)
                 .Parameter("index", ParameterType.Optional)
                 .AddCheck(SimpleCheckers.OwnerOnly())