Link for "Package Management" (in /learn/build-system) is incorrect

[rusty-tendrils]

https://github.com/ziglang/www.ziglang.org/blob/a65e795e77a8b97aee26538e313dcc1f732e5ef1/old-content/learn/build-system.en.md?plain=1#L257

Not sure if the section was not made yet or if it was supposed to point to a different section.

[Jiehong]

This is still the case, it points nowhere (https://ziglang.org/learn/build-system/#).