Bump mypy from 1.17.1 to 1.18.1 (#2532) #8168

Job	Run time
static	3m 44s
DocTest	1m 6s
CPython 3.9-ubuntu-latest	11m 35s
CPython pypy-3.10-ubuntu-latest	12m 36s
CPython 3.13t-ubuntu-latest	11m 52s
Docs Checks	39s
Link Check	4m 38s
Typing Tests (3.11)	1m 2s
Typing Tests (3.9)	1m 3s
Make an sdist	16s
Test async's minimum dependencies and Python	47s
Test using minimum dependencies and supported Python	37s
Install from SDist and Test	49s
	50m 44s

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