focuswriter: 1.6.13 -> 1.6.14 (#43199)

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

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

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/xliiidqc3smccya1a4fc587hq0wl67hx-focuswriter-1.6.14/bin/focuswriter had a zero exit code or showed the expected version
- 0 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 1.6.14 with grep in /nix/store/xliiidqc3smccya1a4fc587hq0wl67hx-focuswriter-1.6.14
- directory tree listing: https://gist.github.com/9f4508c662704c3b5816978445e872fc
- du listing: https://gist.github.com/1219d595782c68ce78122f6ec9566b23