fixed typo

Author: msmimart

articles/active-directory/b2b/current-limitations.md

@@ -32,5 +32,5 @@ Azure AD B2B is subject to Azure AD service directory limits. For details about
 See the following articles on Azure AD B2B collaboration:
 
 - [What is Azure AD B2B collaboration?](what-is-b2b.md)
-- [Delegate B2bB collaboration invitations](delegate-invitations.md)
+- [Delegate B2B collaboration invitations](delegate-invitations.md)