Update ReadMe

README.md

@@ -1,9 +1,9 @@
-# The godot-rust book
+# gdnative book
 
-The godot-rust book is a user guide for the Rust bindings. The book is still work-in-progress, and contributions are very welcome.
+The gdnative book is a user guide for the [gdnative library][gdnative], the Rust bindings to Godot 3.
 
 An online version of the book is available at [godot-rust.github.io/gdnative-book][book-web].
-For the gdext book, check out [gdext-book].
+For the gdext book (Godot 4), check out [gdext-book].
 
 The book is built with [mdBook] and the plugins [mdbook-toc] and [mdbook-admonish]. To install them and build the book locally, you can run:
 ```bash
@@ -28,7 +28,8 @@ For contributions, see the contributing guidelines under `CONTRIBUTING.md` in th
 
 Any contribution intentionally submitted for inclusion in the work by you shall be licensed under the [MIT license], without any additional terms or conditions.
 
-[book-web]: https://godot-rust.github.io/book
+[gdnative]: https://github.com/godot-rust/gdnative
+[book-web]: https://godot-rust.github.io/gdnative-book
 [gdext-book]: https://github.com/godot-rust/book
 [mdBook]: https://github.com/rust-lang-nursery/mdBook
 [mdbook-toc]: https://github.com/badboy/mdbook-toc