altcoins.parity-ui: 0.1.1 -> 0.2.1 (#40647)

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

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

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/11bn5brs3infc88fhfcxq5zhy8p1fsg3-parity-ui-0.2.1/bin/parity-ui had a zero exit code or showed the expected version
- 0 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 0.2.1 with grep in /nix/store/11bn5brs3infc88fhfcxq5zhy8p1fsg3-parity-ui-0.2.1
- directory tree listing: https://gist.github.com/1087da639a875b39e9704339efd4a70c
- du listing: https://gist.github.com/d17a3cbf1828838b4d0115d801e376c0