book: Add link to Chinese translation (#1894)

* book: Add link to Chinese translation

* Fix link

* Fix GNOME link?

book/src/introduction.md

@@ -44,6 +44,10 @@ If you are interested in contained and useful examples, we refer you to the corr
 Every valid code snippet in the book is part of a listing.
 Like the examples, the listings be found in the [repository](https://github.com/gtk-rs/gtk4-rs/tree/main/book/listings) of `gtk4-rs`.
 
+## Translations
+
+This book has been translated to Chinese by 陈竞阁 and is served under the following [website](https://mario-hero.github.io/gtk-book-zh_cn/).
+
 ## License
 
 The book itself is licensed under the [Creative Commons Attribution 4.0 International license](https://creativecommons.org/licenses/by/4.0/).

book/src/libadwaita.md

@@ -1,14 +1,14 @@
 # Libadwaita
 
 If you target a certain platform with your GUI, you will want to follow the platform's [Human Interface Guidelines](https://en.wikipedia.org/wiki/Human_interface_guidelines) (HIG).
-With a GTK application, chances are the platform is either [elementary OS](https://elementary.io) or [GNOME](https://www.gnome.org/).
+With a GTK application, chances are the platform is either [elementary OS](https://elementary.io) or [GNOME](https://www.gnome.org).
 In this chapter we will discuss how to follow GNOME's [HIG](https://developer.gnome.org/hig/) with [libadwaita](https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1-latest/). 
 
 Libadwaita is a library augmenting GTK 4 which:
 - provides widgets to better follow GNOME's HIG
 - provides widgets to let applications [change their layout ](https://gnome.pages.gitlab.gnome.org/libadwaita/doc/main/adaptive-layouts.html) based on the available space
 - integrates the Adwaita [stylesheet](https://gnome.pages.gitlab.gnome.org/libadwaita/doc/main/styles-and-appearance.html)
-- allows runtime recoloring with [named colors](https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1-latest/named-colors.html)
+- allows runtime recoloring with [CSS variables](https://gnome.pages.gitlab.gnome.org/libadwaita/doc/1-latest/css-variables.html#ui-colors)
 - adds [API](https://world.pages.gitlab.gnome.org/Rust/libadwaita-rs/stable/latest/docs/libadwaita/struct.StyleManager.html) to support the cross-desktop dark style preference
 
 In order to use the Rust bindings, add the [libadwaita crate](https://crates.io/crates/libadwaita) as dependency by executing: