python3-typing-extensions: upgrade 4.6.3 -> 4.7.0

New features and bug fixes.

NOTE: This is expected to be the last feature release supporting Python 3.7,
      which reaches its end of life on June 27, 2023. Version 4.8.0 will
      support only Python 3.8.0 and up.

https://github.com/python/typing_extensions/blob/main/CHANGELOG.md#release-470-june-28-2023
https://github.com/python/typing_extensions/blob/main/CHANGELOG.md#release-470rc1-june-21-2023



Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>