Log Message:
x11/py-sip6: Update to 6.8.5

Used to build qgis on NetBSD 10/amd64, with qgis verified working.

Upstream NEWS follows.  (It is not clear how migrating from mercurial
to git affects licensing or setuptools, but both changes are visible
in the generated PLIST.)

v6.8.5
  Added setuptools as a project dependency.

v6.8.4

  Added support for Python v3.13 Python v3.13 raises the minimum macOS
  version to 10.13. Ensure that this minimum is used for wheel names
  for projects where all modules use the limited ABI, no matter what
  the minimum requirement of the version of Python being used to build
  the wheel is.

  Make all tools accessable using python -m
    sip-distinfo can now also be run using python -m sipbuild.tools.distinfo.
    sip-module can now also be run using python -m sipbuild.tools.module.

  Completion of the migration from Mercurial
    SIP is now licensed under the BSD-2-Clause license.
    The project has now been migrated from setup.py to setuptools_scm
    and pyproject.toml.