synth move to python 3.11

[hishnik]

Hello.
I'm looking for instructions analog of switching python to default 3.11 version with synth tool:
In /usr/ports/UPDATING there are commands for portmaster:

  For portmaster users:
  # sh
  # portmaster -o lang/python311 python39
  # REINSTALL="$(pkg info -oq '*py39*')"
  # pkg delete -f "*py39*"
  # portmaster $REINSTALL
  # REBUILD=$(pkg query -g "%n:%dn" '*' | grep py3 | grep -v py311 | cut -d : -f 1 | sort -u)
  # portmaster $REBUILD
  # REBUILD2=$(pkg list | grep python-39 | xargs pkg which | awk '{print $6}' | sort -u)
  # portmaster $REBUILD2

  Final steps (for pre-built packages & portmaster):

  If no longer required, Python 3.9 can be removed via
  "pkg remove python39" and the directory /usr/local/lib/python3.9 can
  then be deleted afterwards, if not empty.

How can I do this upgrade correctly with synth tool?
I have doubts on portmaster -o lang/python311 python39
command equivalent.

Thank You.