update faq answer

Author: PatrickFarley

articles/ai-services/openai/faq.yml

@@ -127,7 +127,7 @@ sections:
       - question: |
           How do I get access to Azure OpenAI? 
         answer: |
-          Currently there is no requirement to access Azure OpenAI Service.
+          A Limited Access registration form is not required to access most Azure OpenAI models. Learn more on the [Azure OpenAI Limited Access page](/legal/cognitive-services/openai/limited-access?context=/azure/ai-services/openai/context/context).
 
   - name: Learning more and where to ask questions
     questions: