Label deprecated icons on cheat sheet
**Requirements**

Maybe we should attach some kind of **_deprecated_** label to the will-be-removed-soon `nf-mdi-` icons

![image](https://user-images.githubusercontent.com/16012374/216005844-67df852d-70d1-4ba3-878d-348b431804cc.png)



- [x] I have searched the [issues](https://github.com/ryanoasis/nerd-fonts/issues) for my request and found nothing related and/or helpful
- [x] I have searched the [FAQ](https://github.com/ryanoasis/nerd-fonts/wiki/FAQ-and-Troubleshooting) for help
- [x] I have searched the [Wiki](https://github.com/ryanoasis/nerd-fonts/wiki) for help

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