Fix flag count for gfe2_reloadable_flag_quic_bbr2_probe_two_rounds.

PiperOrigin-RevId: 494798348

quiche/quic/core/congestion_control/bbr2_probe_bw.cc

diff --git a/quiche/quic/core/congestion_control/bbr2_probe_bw.cc b/quiche/quic/core/congestion_control/bbr2_probe_bw.cc
index 523763c..cb07b9a 100644
--- a/quiche/quic/core/congestion_control/bbr2_probe_bw.cc
+++ b/quiche/quic/core/congestion_control/bbr2_probe_bw.cc
@@ -462,7 +462,7 @@
                                      Params().full_bw_threshold);
         if (model_->rounds_with_queueing() >=
             Params().max_probe_up_queue_rounds) {
-          QUIC_RELOADABLE_FLAG_COUNT_N(quic_bbr2_probe_two_rounds, 1, 3);
+          QUIC_RELOADABLE_FLAG_COUNT_N(quic_bbr2_probe_two_rounds, 3, 3);
           is_queuing = true;
         }
       }