python-flask-security-too FTBFS

Description:

python-flask-security-too fails to build from source with python-sphinx 7.1+ due to an upstream bug in processing copyright dates when SOURCE_DATE_EPOCH is exported.

With the suggested fix from upstream for that failure check then fails as 4.1.6 appears to be incompatible with the current python-flask.

Additional info:

Steps to reproduce:

$ pkgctl repo clone --protocol=https python-flask-security-too
$ cd python-flask-security-too/
$ pkgctl build
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