deskutils/py-vorta: Update to 0.11.2

• Fix pyproject.toml (via a post-patch target), because the build framework does not recognise its new format. (see https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license-and-license-files )
• Pet portfmt

ChangeLog: https://github.com/borgbase/vorta/releases/tag/v0.11.2
Reported by: portscout!