flask 3.0.2

This is a fix release for the 3.0.x feature release branch. It fixes bugs but does not otherwise change behavior and should not result in breaking changes.

Changes: https://flask.palletsprojects.com/en/3.0.x/changes/#version-3.0.2
Milestone: https://github.com/pallets/flask/milestone/34?closed=1
PyPI: https://pypi.org/project/Flask/3.0.2/