giza.app typos

[weasel]

There are some typos in the app file. Here's a fix:

{application, giza,
[{description, "Client for the Sphinx search engine"},
{vsn, "0.1.0"},
{modules, [giza_datetime,giza_protocol,giza_query,giza_request,giza_response,giza_update,giza_util]},
{applications, [kernel, stdlib]}]}.