palemoon: 27.9.1 -> 27.9.2 (#40838)

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
- /nix/store/5kg07d9qryxy21ikixc0273ngbm3zl3v-palemoon-27.9.2/bin/palemoon passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 1 of 1 passed binary check by having the new version present in output.
- found 27.9.2 with grep in /nix/store/5kg07d9qryxy21ikixc0273ngbm3zl3v-palemoon-27.9.2
- directory tree listing: https://gist.github.com/97521481792d6df556c4536742a77bb4
- du listing: https://gist.github.com/7f246d760956bb748d5e09cfd1193a6b