Autofix: upgrade-rustup-toolchain

Author: autofix-bot

src/docs/languages/rust.md

@@ -9,7 +9,7 @@ Rust is a first-class language in Gitpod, and we believe that Gitpod is a great
 
 ## Rust Version
 
-Gitpod always comes with the latest available Rust toolchain pre-installed using [rustup](https://rustup.rs/). (As of 11 Sep 2020, the Rust version is `1.46.0`, and it's updated [semi-automatically](https://github.com/gitpod-io/workspace-images/pull/282/files) on every official Rust release.)
+Gitpod always comes with the latest available Rust toolchain pre-installed using [rustup](https://rustup.rs/). (As of 11 Sep 2020, the Rust version is `1.47.0`, and it's updated [semi-automatically](https://github.com/gitpod-io/workspace-images/pull/282/files) on every official Rust release.)
 
 You can also use `rustup` yourself in Gitpod in order to switch to a different Rust version, or to install extra components. See the [the rustup book](https://rust-lang.github.io/rustup/index.html) to learn more about `rustup` itself.