mypy

`Doc/library/zoneinfo.rst`: Fix typo (#139190) #16892

Job	Run time
Run mypy on Tools/build	17s
Run mypy on Lib/tomllib	14s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/clinic	18s
Run mypy on Tools/peg_generator	16s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Lib/_pyrepl	25s
Run mypy on Tools/jit	20s
	2m 29s

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