Increase licensify 5xx thresholds
Increase licensify 5xx thresholds

These regularly cross the existing warning threshold, and given there's
no team currently working on it, we should raise the threshold to avoid
these spurious alerts.

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