Summary

Some examples use WenQuanYi Zen Hei as CJK (chinese/japanese/korean) font, but it is less convenient to install on macos (#16112); other examples already rely on Noto Sans CJK, which is still available on Homebrew, so we could just as well always rely on that font instead.

Proposed fix

Replace usage of WenQuanYi Zen Hei by Noto Sans CJK in the docs/galleries.