Update TOC.yml

Author: FaithOmbongi

articles/active-directory/enterprise-users/TOC.yml

@@ -188,7 +188,7 @@
       href: licensing-groups-resolve-problems.md
 - name: Reference
   items:
-  - name: Graph API  
+  - name: Microsoft Graph API  
     href: /graph/api/resources/azure-ad-overview
   - name: Azure AD CLI    
     href: /cli/azure/ad