Reword ch01-03 recap paragraph

The original wording suggests that cargo check builds a project. The new
wording makes it clear what its actual functionality  is.

Author: rxlecky

src/ch01-03-hello-cargo.md

@@ -188,8 +188,9 @@ build` when they’re ready to use the executable.
 
 Let’s recap what we’ve learned so far about Cargo:
 
-* We can build a project using `cargo build` or `cargo check`.
+* We can build a project using `cargo build`.
 * We can build and run a project in one step using `cargo run`.
+* We can check a project's correctness without building it using `cargo check` .
 * Instead of saving the result of the build in the same directory as our code,
   Cargo stores it in the *target/debug* directory.