devel/py-spyder-kernels: Update to 2.4.0

• Add support for Python 3.11
• Flush standard streams after execution.

Changelog: https://github.com/spyder-ide/spyder-kernels/blob/master/CHANGELOG.md#version-240-2022-11-02

Reported by: portscout, Repology
MFH: No (devel/py-spyder not ready)