acknowledge draft-pauly-quic-address-extension (#36)

* acknowledge draft-pauly-quic-address-extension

* Update draft-seemann-quic-address-discovery.md

Add final dot at end of paragraph.

---------

Co-authored-by: Christian Huitema <huitema@huitema.net>

Author: marten-seemann

draft-seemann-quic-address-discovery.md

@@ -209,4 +209,5 @@ TODO: fill out registration request for the transport parameter and frame types
 # Acknowledgments
 {:numbered="false"}
 
-TODO acknowledge.
+Unbeknownst to the authors, the idea of moving address discovery into QUIC was
+conveived of before in {{?I-D.pauly-quic-address-extension}}.