fix/useAync-demo 🧊 Fixed useAsync demo skeleton not proper rendering

[forckes]

The previous useAsync demo skeleton render condition was:

getPokemonQuery.data && !getPokemonQuery.isLoading &&

which is litterly mean to show loading skeleton when data is not loading.

Solution in this pull request is fixes this and renders loading skeleton on every data request.

Alternatively we can use this code to render skeleton only ones for data's first fetch:

{!getPokemonQuery.data && getPokemonQuery.isLoading && (
        {/* LOADING SKELETON */}
      )}

      {getPokemonQuery.data && (
       {/* DATA */}
      )}

Fixes #445