This update comes with a new version of rustup which has much faster updating, especially on windows [0]. If you'd like to experience this performance improvements, run `rustup self update` before your upgrade!
[0] https://www.reddit.com/r/rust/comments/brtec1/rustup_1183_re...
Note for others also unsure of this: `rustup update` also does the self-update step, only after it first updates the toolchains.
Note that there is an open issue to perform the self-update before the update: [0]. Could be a good first patch for someone looking to contribute :)