Change documentation of Entity -> link to use a string array in example

Changed 
"links": [{ "rel": "self", "href": "http://api.x.io/orders/1234" }]
to
"links": [{ "rel": [ "self" ], "href": "http://api.x.io/customers/pj123" }]

in documentation (about line 95 on no wrapping text editor)