message: Update readme.md
  Add R4007 suppression for metricNamespaces since changing it's return type would be a breaking change
diff: @@ -722,6 +722,9 @@ directive:
  - suppress: DefaultErrorResponseSchema
  from: activityLogAlerts_API.json
  reason: 'Updating the error response to the new format would be a breaking change.'
  + - suppress: DefaultErrorResponseSchema
  + from: metricNamespaces_API.json
  + reason: 'Updating the error response to the new format would be a breaking change.'
  - suppress: DefaultErrorResponseSchema
  from: metrics_API.json
  reason: 'Updating the error response to the new format would be a breaking change.'
  