[ci-skip] Fix UseInteractivity() example in Interactivity Tutorial
Created by: ProfDoof
The tutorial used cs interactivity = discord.UseInteractivity();
which is not defined.
So, I replaced it with the code seen in Example Bot 3 here. I'm not sure what each of those fields in the initializer do but I just put them there. If you have any preferences on what should go there instead tell me and I will update my PR.
Also, apparently I did something wrong because the ci-skip doesn't seem like it skipped.