Automatically update flake.lock to the latest version

flake-utils      b1d9ab7066 (2024-03-11) -> c1dfcf0841 (2024-09-17)
nixpkgs          fe065f84d7 (2024-07-01) -> 4fc18e4ca8 (2024-09-18)
nixpkgs-unstable d413e712d5 (2024-09-15) -> 28306a729a (2024-09-23)
serokell-nix     0c102bb3a2 (2024-04-29) -> 3642b78292 (2024-07-17)
tzbot            17219a06f8 (2024-05-07) -> 028d9f17fe (2024-09-03)