insomnia: 5.14.7 -> 5.14.9

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. 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 5.14.9 with grep in /nix/store/5pw045b91pq83nph1x95pqqfd3fbjpi1-insomnia-5.14.9
- found 5.14.9 in filename of file in /nix/store/5pw045b91pq83nph1x95pqqfd3fbjpi1-insomnia-5.14.9