yad: 0.37.0 -> 0.40.0

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/qiw8cbdki0gylr19ryi6204ybp66zni4-yad-0.40.0/bin/yad-icon-browser -h’ got 0 exit code
- ran ‘/nix/store/qiw8cbdki0gylr19ryi6204ybp66zni4-yad-0.40.0/bin/yad-icon-browser --help’ got 0 exit code
- ran ‘/nix/store/qiw8cbdki0gylr19ryi6204ybp66zni4-yad-0.40.0/bin/.yad-icon-browser-wrapped -h’ got 0 exit code
- ran ‘/nix/store/qiw8cbdki0gylr19ryi6204ybp66zni4-yad-0.40.0/bin/.yad-icon-browser-wrapped --help’ got 0 exit code
- found 0.40.0 with grep in /nix/store/qiw8cbdki0gylr19ryi6204ybp66zni4-yad-0.40.0
- directory tree listing: https://gist.github.com/0a4215eabbdbe78cf2ad8560c88f7b9c