units: 2.16 -> 2.17

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

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

These checks were done:

- built on NixOS
- /nix/store/31sfwbmnw4vpchikbc0fv88hwqa6j7pk-units-2.17/bin/units passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 2.17 with grep in /nix/store/31sfwbmnw4vpchikbc0fv88hwqa6j7pk-units-2.17
- directory tree listing: https://gist.github.com/9398a46bc8272d0edd66c877ba0cd160
- du listing: https://gist.github.com/d78a308aacca7211f8470bf140a8c773