Fix live standby of api-postgresql machines
Fix live standby of api-postgresql machines

This hieradata is set incorrectly. However, it appears to be working.
I'm not sure how this works but it's definitely not correct as it stands.

In staging this changes the value from `10.2.3.13/32` to `10.2.4.41/32`.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet