resolve final PR reviewer comment

Author: mrbullwinkle

articles/cognitive-services/openai/whats-new.md

@@ -39,7 +39,7 @@ keywords:
 
 * **Logging and diagnostics** through Azure Resource Health, Cost Analysis, and Metrics & Diagnostic settings​.
 
-* **Studio improvements.** Numerous usability improvements to the Studio workflow including AAD role support to control who in the team has access to create fine-tuned models and deploy.
+* **Studio improvements.** Numerous usability improvements to the Studio workflow including Azure AD role support to control who in the team has access to create fine-tuned models and deploy.
 
 ### Changes (breaking)