Typo in Listing 6.2.1

[Valentin Crettaz]

In listing 6.2.1, the index names int he comments are wrong:

# PUT albinoelphant/docs/1
# { "title":"albino", "body": "elephant"}
# PUT albinoelphant/docs/1
# { "title":"elephant", "body": "elephant"}

should be

# PUT albinoelephant/docs/1
              ^
# { "title":"albino", "body": "elephant"}
# PUT albinoelephant/docs/1
              ^
# { "title":"elephant", "body": "elephant"}