community/py3-construct: upgrade to 2.10.68

v2.10.67...v2.10.68

031049e8 added hint in container documentation
fa0a74f6 added documentation in the docstring
410fb50a Makefile updated to use Python 3.9
75f83556 Docs updated meta: Sizeof needs a lambda.
42224179 updated docs and ci for python 3.10
83f90801 Added the importlib imports, fixing two PRs #930 #945
ccb90b3e version-increment script updated, uses python 3.9
a6603d78 version uped to 2.10.68