fixed typo

Author: eross-msft

articles/active-directory/fundamentals/whats-new.md

@@ -144,7 +144,7 @@ For more information about our native support for Tableau, see [Azure AD Applica
 
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-## New support to add Google as an identity provider for B2B guest users in Azure Active Directory (preview)
+### New support to add Google as an identity provider for B2B guest users in Azure Active Directory (preview)
 
 **Type:** New feature  
 **Service category:** B2B