final preparation for v4.15.2 release #8321

Job	Run time
Docs Checks	47s
DocTest	1m 9s
CPython 3.9-ubuntu-latest	11m 28s
CPython 3.13t-ubuntu-latest	11m 28s
static	4m 51s
Typing Tests (3.11)	1m 0s
CPython pypy-3.10-ubuntu-latest	12m 27s
Test using minimum dependencies and supported Python	43s
Typing Tests (3.9)	58s
Make an sdist	15s
Link Check	2m 39s
Test async's minimum dependencies and Python	47s
Install from SDist and Test	1m 4s
	49m 36s

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