While i was trying to update React and Flow versions, i found a small issue in docs. We were trying to access `android` and `ios` properties on wrong object.
I've noticed that link to the _getting started_ page in the docs seems to not working as expected since `*.html` extension is added anyway and it makes the link broken:
`https://callstack.github.io/react-native-paper/getting-started.html.html`.
### Motivation
The documentation is important part of the library and should be working properly.
### Test plan
Enter `/docs`, install using `yarn` and run it with `yarn start`.
> **NOTE:** _the current version works on localhost and breaks only in the prod env. Suggested change will probably work in both, but needs to be verified by someone who knows the deployment process._
