Fix last date statement was updated
Fix last date statement was updated

The accessibility statement was last updated on 9
October 2020 but without the 'last reviewed' date
being updated.

The changes were contained in this pull request
which was merged the same day and reached
production at 2.13pm.

https://github.com/alphagov/notifications-admin/pull/3677

alphagov/notifications-admin,alphagov/notifications-admin,alphagov/notifications-admin,alphagov/notifications-admin