Change some back.

I was too aggressive with #642

Author: steveklabnik

posts/2020-07-08-Rustup-1.22.1.md

@@ -18,14 +18,14 @@ Rustup will also automatically update itself at the end of a normal toolchain up
 rustup update
 ```
 
-If you don't have it already, or if the 1.22.1 release of rustup caused you to experience the problem that 1.22.1 fixes, you can [get rustup][install] from the appropriate page on our website.
+If you don't have it already, or if the 1.22.0 release of rustup caused you to experience the problem that 1.22.1 fixes, you can [get rustup][install] from the appropriate page on our website.
 
 [rust]: https://www.rust-lang.org
 [install]: https://rustup.rs
 
 ## What's new in rustup 1.22.1
 
-When updating dependency crates for 1.22.1, a change in behaviour of the `url` crate slipped in which caused `env_proxy` to cease to work with proxy data set in the environment.  This is unfortunate since those of you who use `rustup` behind a proxy and have updated to 1.22.1 will now find that rustup may not work properly for you.
+When updating dependency crates for 1.22.0, a change in behaviour of the `url` crate slipped in which caused `env_proxy` to cease to work with proxy data set in the environment.  This is unfortunate since those of you who use `rustup` behind a proxy and have updated to 1.22.0 will now find that rustup may not work properly for you.
 
 If you are affected by this, simply [re-download the installer][install] and run it.  It will update your existing installation of Rust with no need to uninstall first.