doc: remove Vladimir de Turckheim from Security release stewards
As announced internally a couple weeks ago, I am leaving Datadog tomorrow and will step down from Security release stewardship for the time being.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
As announced internally a couple weeks ago, I am leaving Datadog tomorrow and will step down from Security release stewardship for the time being.