git-ftp: 1.4.0 -> 1.5.1 (#40673)

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

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

These checks were done:

- built on NixOS
- /nix/store/99qm5jxal3n5kpyk7jb6byf68zir13hq-git-ftp-1.5.1/bin/git-ftp passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 1 of 1 passed binary check by having the new version present in output.
- found 1.5.1 with grep in /nix/store/99qm5jxal3n5kpyk7jb6byf68zir13hq-git-ftp-1.5.1
- directory tree listing: https://gist.github.com/db2f3eebbf94391961fe177450df28d8
- du listing: https://gist.github.com/8e1f6afd03639aaba4c09de2d38fbf54