Add support for datetime.UTC mandatory for Python > 3.12

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/0.7@3219 b32b6428-25c9-4566-ad07-03861ab6144f

libs/lib/pyproject.toml

 [project]
 name = "xaal.lib"
-version = "0.7.4"
+version = "0.7.5"
 description = "Official Python stack for xAAL protocol"
 readme = "README.rst"
 authors = [