Update draft-ietf-quic-transport.md

Co-authored-by: Marten Seemann <martenseemann@gmail.com>

draft-ietf-quic-transport.md

@@ -1877,7 +1877,7 @@ endpoints.  In particular, receipt of a packet protected with Handshake keys
 confirms that the client received the Initial packet from the server.  Once the
 server has successfully processed a Handshake packet from the client, it can
 consider the client address to have been validated.  Servers MAY treat the
-receipt of a server generated destination connection ID with at least 64 bits
+receipt of a packet using a server generated destination connection ID with at least 64 bits
 of entropy as address validation.
 
 Prior to validating the client address, servers MUST NOT send more than three