Respect international conventions

[Mubelotix]

Hi,

Thanks for your library — it's been really helpful! 🙌

I noticed that the output uses KB to represent kilobytes. However, according to the SI unit convention, the correct notation for kilobyte is kB (lowercase "k" for kilo, uppercase "B" for byte). KB could be misinterpreted as kelvin-bytes or simply seen as incorrect by more strict linters or tools.

Would you consider updating the unit label from KB to kB in the output?
It’s a minor change, but it would improve accuracy and standard compliance.

Happy to submit a PR if that helps!

Thanks again for your work!