python3-typing-extensions: upgrade 4.7.1 -> 4.8.0

python3-typing-extensions: upgrade 4.7.1 -> 4.8.0

Changelog:
===========
-Add typing_extensions.Doc, as proposed by PEP 727.
-Drop support for Python 3.7 (including PyPy-3.7).
-Fix bug where get_original_bases() would return incorrect results when called
 on a concrete subclass of a generic class.
-Fix bug where ParamSpec(default=...) would raise a TypeError on Python versions <3.11.

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>