google_api_play_integrity package is not available on hex.pm

[rschef]

Steps to reproduce

1. Add google_api_play_integrity to your list of dependencies in mix.exs as described in https://github.com/googleapis/elixir-google-api/tree/main/clients/play_integrity

def deps do
  [{:google_api_play_integrity, "~> 0.6"}]
end

2. Run mix deps.get:

** (Mix) No package with name google_api_play_integrity in registry

Indeed there's no such package on hex.pm: https://hex.pm/packages/google_api_play_integrity