Update draft-ietf-uta-tls13-iot-profile.md

Co-authored-by: Thomas Fossati <thomas.fossati@arm.com>

draft-ietf-uta-tls13-iot-profile.md

@@ -121,7 +121,7 @@ with the transition from TLS 1.2 to 1.3:
 
 - TLS 1.3 introduced the concept of post-handshake authentication messages, which
 partially replaced the need for the re-negotiation feature {{?RFC5746}} available
-in earlier TLS versions. However, rekeying defined in Section 4.6.3 of TLS 1.3
+in earlier TLS versions. However, rekeying defined in {{Section 4.6.3 of TLS13}}
 does not provide forward secrecy and post-handshake authentication defined in
 Section 4.6.2 of TLS 1.3 only offers client-to-server authentication.
 {{!RFC9261}} later added support for mutual, post-handshake authentication but