test fix

kafka-ui-api/src/main/java/com/provectus/kafka/ui/service/audit/AuditWriter.java

@@ -60,7 +60,7 @@ record AuditWriter(String clusterName,
     return new AuditRecord(
         DateTimeFormatter.ISO_INSTANT.format(Instant.now()),
         user.principal(),
-        null,
+        ctx.getCluster(), //can be null, if it is application-level action
         AuditResource.getAccessedResources(ctx),
         ctx.getOperationName(),
         ctx.getOperationParams(),