yaws: 2.0.4 -> 2.0.5

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/jyan70fmxqlifcsfk6zidpbapjnclw8g-yaws-2.0.5/bin/yaws -v’ and found version 2.0.5
- ran ‘/nix/store/jyan70fmxqlifcsfk6zidpbapjnclw8g-yaws-2.0.5/bin/yaws --version’ and found version 2.0.5
- found 2.0.5 with grep in /nix/store/jyan70fmxqlifcsfk6zidpbapjnclw8g-yaws-2.0.5
- directory tree listing: https://gist.github.com/2cc3d4631b98fff26e8453c8e0b92ba8