docs: fix cargo-criterion stability status book page (#558)

Co-authored-by: David Himmelstrup <lemmih@gmail.com>

Author: xeptore

book/src/cargo_criterion/cargo_criterion.md

@@ -7,12 +7,12 @@ Currently, `cargo-criterion` provides most of the same features as running Crite
 * `cargo-criterion` is more configurable than Criterion.rs
 * `cargo-criterion` supports machine-readable output using `--message-format=json`
 
-`cargo-criterion` is still under active development, but if you would like to try it out, you can install it with the following command:
+`cargo-criterion` is stable, and you can install it with the following command:
 
-`cargo install --version=1.0.0-alpha3 cargo-criterion`
+`cargo install cargo-criterion`
 
 Once installed, you can run your benchmarks with:
 
 `cargo criterion`
 
-If you encounter any issues or have any suggestions for future features, please raise an issue at [the GitHub repository](https://github.com/bheisler/cargo-criterion).
+If you encounter any issues or have any suggestions for future features, please raise an issue at [the GitHub repository](https://github.com/bheisler/cargo-criterion).