copyq: 3.9.0 -> 3.9.2 (#69490)

* copyq: 3.9.0 -> 3.9.2

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/copyq/versions

* copyq: use mkDerivation from Qt