docs: Add three per company option to diversification levels

PiperOrigin-RevId: 536429537

Author: Google APIs

google/cloud/talent/v4/job_service.proto

@@ -395,6 +395,11 @@ message SearchJobsRequest {
     // pushed to the end of the last page of search result.
     TWO_PER_COMPANY = 4;
 
+    // Similar to ONE_PER_COMPANY, but it allows at most three jobs in the
+    // same company to be shown at once, the other jobs under same company are
+    // dropped.
+    MAX_THREE_PER_COMPANY = 6;
+
     // The result list is ordered such that somewhat similar results are pushed
     // to the end of the last page of the search results. This option is
     // recommended if SIMPLE diversification does not diversify enough.