Make the healthcheck thresholds for email-alert-api match the code
Make the healthcheck thresholds for email-alert-api match the code

In https://github.com/alphagov/email-alert-api/pull/283 I wasn't
aware they were being overridden Puppet, but since they are it
makes sense to match the values we're using there.

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