Update draft-ietf-quic-transport.md

Co-Authored-By: Martin Thomson <mt@lowentropy.net>

draft-ietf-quic-transport.md

@@ -4644,7 +4644,7 @@ preferred_address (0x000d):
   port (0.0.0.0:0 or ::.0) for the other family. IP addresses are encoded in
   network byte order. The Connection ID field and the Stateless Reset Token
   field contain an alternative connection ID that has a sequence
-  number of one ({{issue-cid}}). Having them bundled with the preferred address
+  number of 1 ({{issue-cid}}). Having these values bundled with the preferred address
   ensures that there will be at least one unused active connection ID when the
   client initiates migration to the preferred address. The CID Length field
   contains the length of the Connection ID field.