brotli: 1.0.3 -> 1.0.4

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/7izjihjc6qc7z96hqvbh6y56rs7q63nd-brotli-1.0.4/bin/brotli -h’ got 0 exit code
- ran ‘/nix/store/7izjihjc6qc7z96hqvbh6y56rs7q63nd-brotli-1.0.4/bin/brotli --help’ got 0 exit code
- ran ‘/nix/store/7izjihjc6qc7z96hqvbh6y56rs7q63nd-brotli-1.0.4/bin/brotli -V’ and found version 1.0.4
- ran ‘/nix/store/7izjihjc6qc7z96hqvbh6y56rs7q63nd-brotli-1.0.4/bin/brotli --version’ and found version 1.0.4
- directory tree listing: https://gist.github.com/8f1f6ce7cb6e005fe8d7cb00a4f50222