ext/rustup @413c4ed3-c2a8-49ea-9b98-ca5b3733c53e/main

The path at ext/rustup contains a submodule, revision c31b781f1a50f4aa20c2d1b8f9aa661f1fcd4c40. It can be checked out from https://salsa.debian.org/rust-team/rustup.git.