Log Message:
py-cheetah3: Update to 3.4.0

Upstream changed the name of their project on pypi; this follows the
new name.  (This is not a fork; it's the same upstream.)

Upstream NEWS, less bugfixes and minor improvements:

3.3.0 (2022-10-10)

Great move:

        PyPI has wrongfully classified project Cheetah3 as
        “critical”. This puts a burden to use 2FA to manage the
        project at PyPI. To avoid the burden the project is renamed to
        CT3 at PyPI. There will be no updates for Cheetah3. Sorry for
        the inconvenience!