Update service-limits.md

Added max number of classes

Author: vkurpad

articles/ai-services/document-intelligence/service-limits.md

@@ -90,8 +90,12 @@ This article contains both a quick reference and detailed description of Azure A
 | Adjustable | No |Yes <sup>3</sup>|
 | **Max number of pages (Training) * Classifier** | 10,000 | 10,000 (default value) |
 | Adjustable | No | No |
+| **Max number of document types (classes) * Classifier** | 500 | 500 (default value) |
+| Adjustable | No | No |
 | **Training dataset size * Classifier** | 1GB | 1GB (default value) |
 | Adjustable | No | No |
+| **Min number of samples per class * Classifier** | 5 | 5 (default value) |
+| Adjustable | No | No |
 
 ::: moniker-end