add actual owner from datahub to chart details template (#513)

Author: LavMatt

templates/details_chart.html

@@ -62,7 +62,7 @@ <h3 class="govuk-heading-s govuk-!-margin-top-3">
             </div>
         </div>
         <div class="govuk-grid-column-one-third">
-            {% include "partial/contact_info.html" with data_owner="chart owner" data_owner_email="chart owner email" slack_channel=chart.custom_properties.further_information %}
+            {% include "partial/contact_info.html" with data_owner=chart.governance.data_owner.display_name data_owner_email=chart.governance.data_owner.email slack_channel=chart.custom_properties.further_information %}
         </div>
     </div>
     <div class="govuk-grid-row">