minor grammar fix

Author: erichschroeter

src/intro/index.md

@@ -55,7 +55,7 @@ If you are unfamiliar with anything mentioned above or if you want more informat
 
 | Topic        | Resource | Description |
 |--------------|----------|-------------|
-| Rust         | [Rust Book](https://doc.rust-lang.org/book/) | If you are not yet comfortable with Rust, we highly suggest reading the this book. |
+| Rust         | [Rust Book](https://doc.rust-lang.org/book/) | If you are not yet comfortable with Rust, we highly suggest reading this book. |
 | Rust, Embedded | [Embedded Rust Bookshelf](https://docs.rust-embedded.org) | Here you can find several other resources provided by Rust's Embedded Working Group. |
 | Rust, Embedded | [Embedonomicon](https://docs.rust-embedded.org/embedonomicon/) | The nitty gritty details when doing embedded programming in Rust. |
 | Rust, Embedded | [embedded FAQ](https://docs.rust-embedded.org/faq.html) | Frequently asked questions about Rust in an embedded context. |