cups has a new package dependency on python3, which is not necessary at all, only the dependency on /usr/libexec/platform-python is required, in order to execute post script /usr/sbin/upgrade_get_document.

# rpm -q --requires -p ./cups-2.2.6-51.el8_8.1.x86_64.rpm  | grep python
/usr/libexec/platform-python
python3 

This unneeded dependency got introduced by CVE-2023-32360 because of the unneeded new stanzas below:

# for upgrade-get-document script
%if %{with python3}
Requires(post): python3
%else
Requires(post): python
%endif 

Please rebuild the package without this block.