Update dependency typing_extensions to v4.12.2

This MR contains the following updates:

Package	Update	Change
typing_extensions (changelog)	patch	==4.12.1 -> ==4.12.2

All Renovate MRs are tracked by #227.

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Release Notes

python/typing_extensions (typing_extensions)

v4.12.2

Compare Source

• Add typing_extensions.get_annotations, a backport of inspect.get_annotations that adds features specified by PEP 649. Patch by Jelle Zijlstra.
• Fix regression in v4.12.0 where specialization of certain generics with an overridden __eq__ method would raise errors. Patch by Jelle Zijlstra.
• Fix tests so they pass on 3.13.0b2

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