Fix typo in 01-zig-weird.qmd

[kurz-m]

Fixed a typo in chapter 1

I found a small typo in chapter one, where you were talking about "How strings work in Zig?"

I change from this:

Zig always assumes that this sequence of bytes is UTF-8 encoded. This might not be true for every sequence of bytes you have it, ...

To this:

Zig always assumes that this sequence of bytes is UTF-8 encoded. This might not be true for every sequence of bytes you're working with, ...

[pedropark99]

Hey @kurz-m ! Thank you very much for your contribution ❤️