chrony: 3.2 -> 3.3

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/chrony/versions.

These checks were done:

- built on NixOS
- ran ‘/nix/store/d5v3k2h8rdhxzyg4my66nrr0zhdhzvaw-chrony-3.3/bin/chronyc --help’ got 0 exit code
- ran ‘/nix/store/d5v3k2h8rdhxzyg4my66nrr0zhdhzvaw-chrony-3.3/bin/chronyc help’ got 0 exit code
- ran ‘/nix/store/d5v3k2h8rdhxzyg4my66nrr0zhdhzvaw-chrony-3.3/bin/chronyd -h’ got 0 exit code
- ran ‘/nix/store/d5v3k2h8rdhxzyg4my66nrr0zhdhzvaw-chrony-3.3/bin/chronyd --help’ got 0 exit code
- found 3.3 with grep in /nix/store/d5v3k2h8rdhxzyg4my66nrr0zhdhzvaw-chrony-3.3
- directory tree listing: https://gist.github.com/60dede830d6efc2bf29be2b4983e4c97