Update lib/common/http3client.c
Update lib/common/http3client.c

Co-authored-by: Kazuho Oku <c16dbe3d2ffd406ceb28de8a69ce0c629182a158@gmail.com>
devnexen/h2o,cwyang/h2o,cwyang/h2o,devnexen/h2o,devnexen/h2o,yannick/h2o,yannick/h2o,yannick/h2o,h2o/h2o,h2o/h2o,yannick/h2o,cwyang/h2o,h2o/h2o,h2o/h2o,cwyang/h2o,cwyang/h2o,devnexen/h2o,cwyang/h2o,devnexen/h2o,cwyang/h2o,yannick/h2o,cwyang/h2o,devnexen/h2o,devnexen/h2o,yannick/h2o,h2o/h2o,h2o/h2o,yannick/h2o,h2o/h2o,devnexen/h2o,h2o/h2o,devnexen/h2o,yannick/h2o,yannick/h2o,h2o/h2o