update non-working example in more-data section

[rshmhrj]

Going through the tour, I got stuck for at least 2-3 hours trying to get this query (expanding and seeing all of the starring in a movie) to work. Ended up dropping data, reimporting, and trying many schema tweaks many times.

I think either updating this section, or pre-filling the full, correct query would be very helpful and allow an easier transition for new users and learners.

Two versions of the full query are below:

{
  kathryn(func: eq(name@., "Kathryn Bigelow")) {
    uid
    name@.
    director.film (first: 1) {
      name@.
      initial_release_date
      genre { name@. }
      starring { 
        uid
        performance.film { name@. }
        performance.actor {
          name@.
        }
        performance.character {
          name@.
        }
      }
    }
  }
}

{
  kathryn(func: eq(name@., "Kathryn Bigelow")) {
    uid
    name@.
    director.film (first: 1) {
      name@.
      initial_release_date
      genre { name@. }
      starring { 
        expand(Performance) {
            uid
            expand(_all_)
        }
      }
    }
  }
}

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This change is 

[CLAassistant]

All committers have signed the CLA.

[rshmhrj]

@MichelDiz can you please review and merge this minor change in?

[MichelDiz]

@rshmhrj sorry, I can't. I have no rights to do so. And right now I have no idea who have.

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[rshmhrj]

Can this be merged in?