rustup update

info: syncing channel updates for 'stable-aarch64-apple-darwin'
info: syncing channel updates for 'nightly-aarch64-apple-darwin'
info: checking for self-update

   stable-aarch64-apple-darwin unchanged - rustc 1.73.0 (cc66ad468 2023-10-03)
  nightly-aarch64-apple-darwin unchanged - rustc 1.75.0-nightly (bf9a1c8a1 2023-10-08)