palemoon: 27.8.3 -> 27.9.0

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/0qfxznyni5ivyrj3hs0w6dhlk3z4kfaq-palemoon-27.9.0/bin/palemoon -h’ got 0 exit code
- ran ‘/nix/store/0qfxznyni5ivyrj3hs0w6dhlk3z4kfaq-palemoon-27.9.0/bin/palemoon --help’ got 0 exit code
- ran ‘/nix/store/0qfxznyni5ivyrj3hs0w6dhlk3z4kfaq-palemoon-27.9.0/bin/palemoon -V’ and found version 27.9.0
- ran ‘/nix/store/0qfxznyni5ivyrj3hs0w6dhlk3z4kfaq-palemoon-27.9.0/bin/palemoon -v’ and found version 27.9.0
- ran ‘/nix/store/0qfxznyni5ivyrj3hs0w6dhlk3z4kfaq-palemoon-27.9.0/bin/palemoon --version’ and found version 27.9.0
- found 27.9.0 with grep in /nix/store/0qfxznyni5ivyrj3hs0w6dhlk3z4kfaq-palemoon-27.9.0
- directory tree listing: https://gist.github.com/d3039819d96bec3615450de44abbffc4