jackett: 0.8.953 -> 0.8.997

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
- /nix/store/1rbrbn9h8ll5srwpv073578fcb0y930j-jackett-0.8.997/bin/Jackett passed the binary check.
- 1 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 0.8.997 with grep in /nix/store/1rbrbn9h8ll5srwpv073578fcb0y930j-jackett-0.8.997
- directory tree listing: https://gist.github.com/725e5ff70be355ede10316c73e49da01
- du listing: https://gist.github.com/46fe05a40289b5eb82e68af6ef0dd0d0