Changed `ExecuteAsync` to `ExecuteCommandAsync`

`_interactionService.ExecuteAsync(ctx, serviceProvider);` cannot be executed because the method `ExecuteAsync` does not exists.

docs/guides/int_framework/samples/intro/context.cs

@@ -1,7 +1,7 @@
 discordClient.ButtonExecuted += async (interaction) => 
 {
     var ctx = new SocketInteractionContext<SocketMessageComponent>(discordClient, interaction);
-    await _interactionService.ExecuteAsync(ctx, serviceProvider);
+    await _interactionService.ExecuteCommandAsync(ctx, serviceProvider);
 };
 
 public class MessageComponentModule : InteractionModuleBase<SocketInteractionContext<SocketMessageComponent>>