Update jailbreak-detection.md

Author: jinruishao

articles/ai-services/content-safety/concepts/jailbreak-detection.md

@@ -73,6 +73,12 @@ Currently, the Prompt Shields API supports the English language. While our API d
 
 The maximum character limit for Prompt Shields allows for a user prompt of up to 10,000 characters, while the document array is restricted to a maximum of 5 documents with a combined total not exceeding 10,000 characters.
 
+### Regions
+To use this API, you must create your Azure AI Content Safety resource in the supported regions. Currently, it's available in the following Azure regions:
+
+East US
+West Europe
+
 ### TPS limitations
 
 | Pricing Tier | Requests per 10 seconds |