Add CrackTunes to the list of bots using poise (#332)

README.md

@@ -32,6 +32,7 @@ For each bot, there's a list of notable features for you to take inspiration fro
 - [Etternabot](https://github.com/kangalio/Etternabot) by [@kangalio](https://github.com/kangalio): response transformation, variadic and lazy arguments
 - [Rustbot](https://github.com/rust-community-discord/ferrisbot-for-discord) by [@kangalio](https://github.com/kangalio): database, custom prefixes
 - [StatPixel](https://github.com/statpixel-rs/statpixel) by [@matteopolak](https://github.com/matteopolak): modals, buttons, dropdowns, database, localization
+- [CrackTunes](https://github.com/cycle-five/cracktunes) by [@cycle-five](https://github.com/cycle-five): database, voice, custom prefixes, modals.
 
 You're welcome to add your own bot [via a PR](https://github.com/serenity-rs/poise/compare)!