redis: 4.0.8 -> 4.0.9

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

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

These checks were done:

- built on NixOS
- ran `/nix/store/li8wiv90v6f9gbsfsg6m9kppyvccmsgg-redis-4.0.9/bin/redis-server -v` and found version 4.0.9
- ran `/nix/store/li8wiv90v6f9gbsfsg6m9kppyvccmsgg-redis-4.0.9/bin/redis-server --version` and found version 4.0.9
- ran `/nix/store/li8wiv90v6f9gbsfsg6m9kppyvccmsgg-redis-4.0.9/bin/redis-benchmark --help` got 0 exit code
- ran `/nix/store/li8wiv90v6f9gbsfsg6m9kppyvccmsgg-redis-4.0.9/bin/redis-cli -v` and found version 4.0.9
- ran `/nix/store/li8wiv90v6f9gbsfsg6m9kppyvccmsgg-redis-4.0.9/bin/redis-cli --version` and found version 4.0.9
- found 4.0.9 with grep in /nix/store/li8wiv90v6f9gbsfsg6m9kppyvccmsgg-redis-4.0.9
- directory tree listing: https://gist.github.com/aa9a9c80a05ebbc58dac3d99c31f5258