Promoted crate_universe to non-experimental (#1504)

* Promoted crate_universe to non-experimental

* Regenerate documentation

* Update docs/index.md

Co-authored-by: Krasimir Georgiev <krasimir@google.com>

Co-authored-by: Krasimir Georgiev <krasimir@google.com>
diff --git a/crate_universe/docs.bzl b/crate_universe/docs.bzl
index 11ab921..fe5ef83 100644
--- a/crate_universe/docs.bzl
+++ b/crate_universe/docs.bzl
@@ -2,10 +2,6 @@
 
 Crate Universe is a set of Bazel rule for generating Rust targets using Cargo.
 
-## Experimental
-
-`crate_universe` is experimental, and may have breaking API changes at any time. These instructions may also change without notice.
-
 ## Setup
 
 After loading `rules_rust` in your workspace, set the following to begin using `crate_universe`:
diff --git a/docs/crate_universe.md b/docs/crate_universe.md
index bfb4316..3964457 100644
--- a/docs/crate_universe.md
+++ b/docs/crate_universe.md
@@ -4,10 +4,6 @@
 
 Crate Universe is a set of Bazel rule for generating Rust targets using Cargo.
 
-## Experimental
-
-`crate_universe` is experimental, and may have breaking API changes at any time. These instructions may also change without notice.
-
 ## Setup
 
 After loading `rules_rust` in your workspace, set the following to begin using `crate_universe`:
diff --git a/docs/index.md b/docs/index.md
index b84d758..b2e8eee 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -52,12 +52,12 @@
 - [rust_bindgen](rust_bindgen.md): rules for generating C++ bindings.
 - [rust_wasm_bindgen](rust_wasm_bindgen.md): rules for generating [WebAssembly](https://www.rust-lang.org/what/wasm) bindings.
 - [cargo](cargo.md): Rules dedicated to Cargo compatibility. ie: [`build.rs` scripts](https://doc.rust-lang.org/cargo/reference/build-scripts.html).
+- [crate_universe](crate_universe.md): Rules for generating Bazel targets for external crate depednencies.
 
 You can also browse the [full API in one page](flatten.md).
 
 ### Experimental rules
 
-- [crate_universe](crate_universe.md): Rules for generating Bazel targets for external crate depednencies.
 - [rust_analyzer](rust_analyzer.md): rules for generating `rust-project.json` files for [rust-analyzer](https://rust-analyzer.github.io/)
 
 ## Specifying Rust version
@@ -82,5 +82,4 @@
 
 ## External Dependencies
 
-If [crate_universe](crate_universe.md) does not suit your needs, another common approach to managing external dependencies is using
-[cargo-raze](https://github.com/google/cargo-raze) to generate `BUILD` files for Cargo crates.
+[crate_universe](crate_universe.md) is a tool built into `rules_rust` that can be used to fetch dependencies. Additionally, [cargo-raze](https://github.com/google/cargo-raze) is an older third-party which can also fetch dependencies.