memo: Fix broken links [ci skip]
@@ -9,6 +9,6 @@ Rust grammar for [tree-sitter](https://github.com/tree-sitter/tree-sitter)
* [The Rust Grammar Reference.](https://doc.rust-lang.org/grammar.html) It provides chapters that formally define the language grammar.
-* [The Rust Reference.](https://doc.rust-lang.org/reference.html) While Rust does not have a specification, the reference tries to describe its working in detail. It tends to be out of date.
+* [The Rust Reference.](https://doc.rust-lang.org/reference/) While Rust does not have a specification, the reference tries to describe its working in detail. It tends to be out of date.
-* [Syntax Index.](https://doc.rust-lang.org/book/syntax-index.html) This appendix from The Book contains examples of all syntax in Rust cross-referenced with the section of The Book that describes it.
+* [Syntax Index.](https://doc.rust-lang.org/book/first-edition/syntax-index.html) This appendix from The Book contains examples of all syntax in Rust cross-referenced with the section of The Book that describes it.
