frostwire-bin: 6.6.3 -> 6.6.5

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

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

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 6.6.5 with grep in /nix/store/6cgry9k7i6ni9a7axglsm5akmibryimi-frostwire-6.6.5
- directory tree listing: https://gist.github.com/e29014b6db646e0dd934f79b2e387703