Merge branch 'jobs-datetime-property' into 'master'

Add datetime property to duration_cell of Jobs

See merge request gitlab-org/gitlab!80420

app/assets/javascripts/jobs/components/table/cells/duration_cell.vue

@@ -39,6 +39,7 @@ export default {
       <time
         v-gl-tooltip
         :title="tooltipTitle(finishedTime)"
+        :datetime="finishedTime"
         data-placement="top"
         data-container="body"
       >