Check for updates no longer works

[tpimh]

It still checks for latest release on GitHub, and tries to compare it to the currently running version:

Traceback (most recent call last):
  File "/home/dima/Documents/appimage/bcnc/bCNC/bCNC.AppDir/usr/lib/python3.10/site-packages/bCNC/Utils.py", line 533, in __call__
    return self.func(*args)
  File "/home/dima/Documents/appimage/bcnc/bCNC/bCNC.AppDir/usr/lib/python3.10/site-packages/bCNC/Updates.py", line 174, in check
    if self.isNewer(latest_version):
  File "/home/dima/Documents/appimage/bcnc/bCNC/bCNC.AppDir/usr/lib/python3.10/site-packages/bCNC/Updates.py", line 152, in isNewer
    for a, b in zip(av, bv):
ValueError: invalid literal for int() with base 10: 'pypi'

Should check for the latest release on PyPI instead.