Automatically update flake.lock to the latest version

deploy-rs    724463b5a9 (2023-06-14) -> 31c32fb295 (2023-09-12)
flake-utils  919d646de7 (2023-07-11) -> ff7b65b44d (2023-09-12)
serokell-nix 851b937e52 (2023-08-03) -> 7503014062 (2023-09-05)
tzbot        c637be13b2 (2023-03-09) -> 4b243ec15a (2023-09-08)