SUSE-SU-2021:2940-1 Security update for python39

This update for python39 fixes the following issues: - CVE-2021-29921: Fixed improper input validation of octal string IP addresses bsc1185706. - Use versioned python-Sphinx to avoid dependency on other version of Python bsc1183858. - Stop providing 'python' symbol bsc1185588, which means python2...