[APIM] Update genai-gateway-capabilities.md

Link to AI Gateway workshop

Author: dlepow

articles/api-management/genai-gateway-capabilities.md

@@ -126,6 +126,7 @@ To help safeguard users from harmful, offensive, or misleading content, you can
 ## Labs and samples
 
 * [Labs for the AI gateway capabilities of Azure API Management](https://github.com/Azure-Samples/ai-gateway)
+* [AI gateway workshop](https://aka.ms/ai-gateway/workshop)
 * [Azure API Management (APIM) - Azure OpenAI Sample (Node.js)](https://github.com/Azure-Samples/genai-gateway-apim)
 * [Python sample code for using Azure OpenAI with API Management](https://github.com/Azure-Samples/openai-apim-lb/blob/main/docs/sample-code.md)