leatherman: 1.4.0 -> 1.4.1

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

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

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 1.4.1 with grep in /nix/store/9wbh0aq3a46hkm7ybz7mi5ns2s1hwsp9-leatherman-1.4.1
- directory tree listing: https://gist.github.com/478abe4c1470eb6b45919b8e1eca9538