[DOC-10909] Add 'Errors' Logging Qualifier (#365)

Author: rakhi-prathap

modules/n1ql/pages/n1ql-manage/monitoring-n1ql-query.adoc

@@ -840,6 +840,7 @@ A completed request is logged if _any_ of the qualifiers are met (logical OR).
 `context`:: Log requests with this client context ID.
 `statement`:: Log requests that match the specified LIKE search pattern in the query text.
 `plan`:: Log requests where the specified plan field values appear in the query plan.
+`errors`:: Log requests with at least this many errors. 
 
 For full details, see xref:n1ql-rest-admin:index.adoc#Logging_Parameters[Logging Parameters].