Add model-router to non-supported models for OYD

Author: sarah-widder

articles/ai-services/openai/concepts/use-your-data.md

@@ -721,6 +721,7 @@ Each user message can translate to multiple search queries, all of which get sen
 > The following models are not supported by Azure OpenAI On Your Data:
 > * o1 models
 > * o3 models
+> * model-router
 
 | Region | `gpt-35-turbo-16k (0613)` | `gpt-35-turbo (1106)` | `gpt-4-32k (0613)` | `gpt-4 (1106-preview)` | `gpt-4 (0125-preview)` | `gpt-4 (0613)`  | `gpt-4o`\*\* | `gpt-4 (turbo-2024-04-09)` |
 |------|---|---|---|---|---|----|----|----|