jackett: 0.8.716 -> 0.8.823

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

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

These checks were done:

- built on NixOS
- ran `/nix/store/kwh7gb5sp7psf4b3jrdd983qkz6j83gm-jackett-0.8.823/bin/Jackett -h` got 0 exit code
- ran `/nix/store/kwh7gb5sp7psf4b3jrdd983qkz6j83gm-jackett-0.8.823/bin/Jackett help` got 0 exit code
- ran `/nix/store/kwh7gb5sp7psf4b3jrdd983qkz6j83gm-jackett-0.8.823/bin/Jackett -v` and found version 0.8.823
- found 0.8.823 with grep in /nix/store/kwh7gb5sp7psf4b3jrdd983qkz6j83gm-jackett-0.8.823
- directory tree listing: https://gist.github.com/bf7b84e7a8b5bd02a6851e84037b42ae