Common: update scaladoc for IabEnrichment case class

[dilyand]

It appears we've changed the class but forgot to update the scaladoc:

/**
 * Contains enrichments based on IAB Spiders&Robots lookup.
 * @param ipFile (Full URI to the IAB excluded IP list, database name)
 * @param excludeUaFile (Full URI to the IAB excluded user agent list, database name)
 * @param includeUaFile (Full URI to the IAB included user agent list, database name)
 * @param localMode Whether to use the local database file. Enabled for tests.
 */
final case class IabEnrichment(schemaKey: SchemaKey, iabClient: IabClient) extends Enrichment {???}