Change TODO from nharper to bug number

PiperOrigin-RevId: 452360399
diff --git a/quiche/quic/core/quic_packet_creator.cc b/quiche/quic/core/quic_packet_creator.cc
index e9938b3..66c7d14 100644
--- a/quiche/quic/core/quic_packet_creator.cc
+++ b/quiche/quic/core/quic_packet_creator.cc
@@ -2072,7 +2072,7 @@
   // 1.3 is used, unittests still use NullEncrypter/NullDecrypter (and other
   // test crypters) which also only use 12 byte tags.
   //
-  // TODO(nharper): Set this based on the handshake protocol in use.
+  // TODO(b/234061734): Set this based on the handshake protocol in use.
   return 7;
 }