title: Update a property value in my Documentdb
body: <p>I have the following result in my document.
  I wanted to update the property value for "Type" and "Workout", such that it doesn't effect other values</p>
  
  <pre><code>"PartyId": 10114795,
  "WorkoutId": 4,
  "Type": "heart-rate-zone-target",
  "DateStarted": "2016-02-05T18:14:15.1620890Z",
  "id": "0c44d1ee-58b8-4083-a702-f770ba0e63e9",
  "_rid": "0ThoANQ4YwEEAAAAAAAAAA==",
  "_self": "dbs/0ThoAA==/colls/0ThoANQ4YwE=/docs/0ThoANQ4YwEEAAAAAAAAAA==/",
  "_etag": "\"08000130-0000-0000-0000-58dd72da0000\"",
  "_attachments": "attachments/",
  "_ts": 1490907866
  </code></pre>