docs: improve language in cargo section (#2892)

I asked Gemini to review the English for inconsistencies and grammar
mistakes. This is the result and I hope it's useful!

As a non-native speaker, it is hard for me to evaluate the finer
details, so let me know if you would like to see changes (or even
better: make them directly in the PR with the suggestion function).

src/cargo.md

@@ -12,7 +12,7 @@ fits into this training.
 
 This will give you the Cargo build tool (`cargo`) and the Rust compiler
 (`rustc`). You will also get `rustup`, a command line utility that you can use
-to install to different compiler versions.
+to install different compiler versions.
 
 After installing Rust, you should configure your editor or IDE to work with
 Rust. Most editors do this by talking to [rust-analyzer], which provides

src/cargo/code-samples.md

@@ -5,7 +5,7 @@ which can be executed through your browser. This makes the setup much easier and
 ensures a consistent experience for everyone.
 
 Installing Cargo is still encouraged: it will make it easier for you to do the
-exercises. On the last day, we will do a larger exercise which shows you how to
+exercises. On the last day, we will do a larger exercise that shows you how to
 work with dependencies and for that you need Cargo.
 
 The code blocks in this course are fully interactive:

src/cargo/running-locally.md

@@ -38,7 +38,7 @@ examples in this training:
    Hello, world!
    ```
 
-4. Replace the boiler-plate code in `src/main.rs` with your own code. For
+4. Replace the boilerplate code in `src/main.rs` with your own code. For
    example, using the example on the previous page, make `src/main.rs` look like
 
    ```rust

src/cargo/rust-ecosystem.md

@@ -2,7 +2,7 @@
 
 The Rust ecosystem consists of a number of tools, of which the main ones are:
 
-- `rustc`: the Rust compiler which turns `.rs` files into binaries and other
+- `rustc`: the Rust compiler that turns `.rs` files into binaries and other
   intermediate formats.
 
 - `cargo`: the Rust dependency manager and build tool. Cargo knows how to