mate.mate-settings-daemon: 1.20.1 -> 1.20.3 (#41985)

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

This update was made based on information from https://repology.org/metapackage/mate-settings-daemon/versions.

These checks were done:

- built on NixOS

- 0 of 0 passed binary check by having a zero exit code.
- 0 of 0 passed binary check by having the new version present in output.
- found 1.20.3 with grep in /nix/store/gdndnz6arz8xpvppphm7jxsyfsm7nq2y-mate-settings-daemon-1.20.3
- directory tree listing: https://gist.github.com/2cdc92987c9492e4c99b02efde4fd349
- du listing: https://gist.github.com/071f4f1371037662c45c8ef83b163383