[sphinx] Solved warning

4 jobs for port-new-ci in 48 minutes and 13 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Build
passed #128711
docker
build_linux_27

00:44:53

passed #128712
docker
build_linux_36

00:44:24

passed #128713
macosx
build_macosx_27

00:40:28

passed #128714
macosx
build_macosx_36

00:37:13