Change QBONE to uppercase in comments.

This is a follow-up to achernya@'s comment on cl/297422796.

gfe-relnote: n/a (comment-only change)
PiperOrigin-RevId: 297568701
Change-Id: I0007249a74a1c6ae3f26d969c74812523b81886c

quic/qbone/qbone_client.h

diff --git a/quic/qbone/qbone_client.h b/quic/qbone/qbone_client.h
index d415e71..2095110 100644
--- a/quic/qbone/qbone_client.h
+++ b/quic/qbone/qbone_client.h
@@ -14,11 +14,11 @@
 
 namespace quic {
 // A QboneClient encapsulates connecting to a server via an epoll server
-// and setting up a Qbone tunnel. See the QboneTestClient in qbone_client_test
+// and setting up a QBONE tunnel. See the QboneTestClient in qbone_client_test
 // for usage.
 class QboneClient : public QuicClientBase, public QboneClientInterface {
  public:
-  // Note that the epoll server, qbone writer, and handler are owned
+  // Note that the epoll server, QBONE writer, and handler are owned
   // by the caller.
   QboneClient(QuicSocketAddress server_address,
               const QuicServerId& server_id,