qbs-docs @1.23.0: destroot failure

[ryandesign (Ryan Carsten Schmidt)]

qbs-docs fails to destroot:

​https://build.macports.org/builders/ports-13_x86_64-builder/builds/5022/steps/install-port/logs/stdio

-- Found Python3: /opt/local/bin/python3.11 (found version "3.11.1") found components: Interpreter 
-- Could NOT find PY_lxml (missing: PY_LXML) 
-- Could NOT find PY_bs4 (missing: PY_BS4) 
CMake Warning at cmake/QbsDocumentation.cmake:166 (message):
  Cannot import lxml and bs4 python modules.  Qbs documentation will not be
  built.

Error: No files have been installed in the destroot directory!

The port declares dependencies on python 3.10 and modules but cmake has found and tried to use python 3.11, for which the modules were not installed.

Modify the configuration process so that python 3.10 is always used, even if python 3.11 is installed.

[Ivan Komissarov <abbapoh@…>]

In 1a25ad1bed58341e8f3dcf79a7d4ac2e86bb060a/macports-ports (master):

qbs-docs: Fix python version

fixes: #66521