www/py-flask-cors: Update to 3.0.8 [1]

• Tweak COMMENT to match setup.py:description (modulo portlint) [2]

Changelog:

https://github.com/corydolphin/flask-cors/blob/3.0.8/CHANGELOG.md

QA:

• Dependents (pygeopi, flexget, beets) dependency <version-specs> verified.

PR: 244206
Submitted by: Stig Inge Lea Bjørnsen <stiginge pvv org> [1]
Approved by: portmgr (blanket: ports (Python) compliance) [2]