Set release date in changelog #55

Job	Run time
Docs Checks	38s
DocTest	1m 7s
CPython 3.9-ubuntu-latest	11m 23s
CPython 3.13t-ubuntu-latest	11m 38s
CPython pypy-3.10-ubuntu-latest	12m 37s
Test using minimum dependencies and supported Python	42s
Make an sdist	14s
Typing Tests (3.9)	1m 3s
Link Check	3m 40s
Typing Tests (3.11)	1m 0s
static	4m 31s
Test async's minimum dependencies and Python	47s
Install from SDist and Test	1m 0s
	50m 20s

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