community/httpie: add missing dependency

Running http --help or http --download example.com shows an error:

pkg_resources.DistributionNotFound: The 'rich>=9.10.0' distribution was not found and is required by httpie

Since 3.2.0, httpie requires py3-rich. This is not documented anywhere, but it is listed as a dependency in setup.py: https://github.com/httpie/httpie/blob/542a2d35dec803f35808bda82c1f308820c563f6/setup.py#L43