title: How to update all the elements of repeated array (fields) of bigquery
body: <p>My Table has the schema:</p>
  <p>name: String - Nullable</p>
  <p>Email: String - Nullable</p>
  <p>Contact-number : String - Repeated</p>
  <p>age: int64 Nullable</p>
  <p>eg:</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Name</th>
  <th>Email</th>
  <th>Contact-number</th>
  <th>Age</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>John</td>
  <td>row</td>
  <td>1256545, 1309045</td>
  <td>30</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>I want to update both the numbers of the user John.</p>