Update the rustup URL

Author: wezm

src/doc/src/getting-started/installation.md

@@ -8,7 +8,7 @@ by using `rustup`. Installing Rust using `rustup` will also install `cargo`.
 On Linux and macOS systems, this is done as follows:
 
 ```console
-$ curl -sSf https://static.rust-lang.org/rustup.sh | sh
+$ curl https://sh.rustup.rs -sSf | sh
 ```
 
 It will download a script, and start the installation. If everything goes well,