MINOR: quic: Trace fix in quic_pto_pktns() (handshaske status)

The handshake must be confirmed before probing the 01RTT packet number space.

Must be backported to 2.7 and 2.6.
diff --git a/src/quic_loss.c b/src/quic_loss.c
index bb518ca..888b61d 100644
--- a/src/quic_loss.c
+++ b/src/quic_loss.c
@@ -118,7 +118,7 @@
 
 		if (i == QUIC_TLS_PKTNS_01RTT) {
 			if (!handshake_confirmed) {
-				TRACE_STATE("TX PTO handshake not already completed", QUIC_EV_CONN_SPTO, qc);
+				TRACE_STATE("TX PTO handshake not already confirmed", QUIC_EV_CONN_SPTO, qc);
 				pktns = p;
 				goto out;
 			}