License change: python-email-validator 2.1.1 is Unlicense (was CC0-1.0)

[Ben Beasley]

Beginning with version 2.1.1, the license of python-email-validator has 
changed from CC0-1.0 to Unlicense.

Note that CC0-1.0 is no longer allowed for code in Fedora, but 
python-email-validator was covered by the exception for pre-existing 
code in Fedora.

Version 2.1.1 will be built as an update for F39 and later; F38 and 
EPEL8/EPEL9 will remain on older 1.x releases.