small change to update file name (#2511)
small change to update file name (#2511)

I was working through this tutorial and noticed that the generated file name is actually `LaunchListQuery.kt` and thought it might confuse people.
apollographql/apollo-android,apollostack/apollo-android,apollostack/apollo-android,apollostack/apollo-android,apollographql/apollo-android,apollographql/apollo-android