docs(readme): add a joke

Author: rami3l

README.md

@@ -2,14 +2,20 @@
 
 [![Build Status][actions-default-branch]][actions-default-branch-status]
 
-*Rustup* installs [The Rust Programming Language][rustlang] from the official
+_Rustup_ installs [The Rust Programming Language][rustlang] from the official
 release channels, enabling you to easily switch between stable, beta,
 and nightly compilers and keep them updated. It makes cross-compiling
 simpler with binary builds of the standard library for common platforms.
 And it runs on all platforms Rust supports, including Windows.
 
 [rustlang]: https://www.rust-lang.org
 
+Want an in-house garbage collector? It's as simple as:
+
+```console
+> rustup component add rust-gc
+```
+
 ## Documentation
 
 See [**The Rustup book**](https://rust-lang.github.io/rustup/) for
@@ -29,11 +35,12 @@ contributors.
 
 Licensed under either of
 
-* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or https://www.apache.org/licenses/LICENSE-2.0)
-* MIT license ([LICENSE-MIT](LICENSE-MIT) or https://opensource.org/licenses/MIT)
+- Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or https://www.apache.org/licenses/LICENSE-2.0)
+- MIT license ([LICENSE-MIT](LICENSE-MIT) or https://opensource.org/licenses/MIT)
 
 at your option.
 
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+
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