New review comment by basicfunc on void-packages repository

https://github.com/void-linux/void-packages/pull/35361#discussion_r810853011

Comment:
>mold is written in C++20, so if you build mold yourself, you need a recent version of a C++ compiler and a C++ standard library.

From [mold](https://github.com/rui314/mold#how-to-build)'s github