mypy

gh-136028: Fix parsing month names containing "İ" (U+0130) in strptim… #15499

Job	Run time
Run mypy on Lib/test/libregrtest	18s
Run mypy on Lib/_pyrepl	18s
Run mypy on Tools/build	20s
Run mypy on Tools/clinic	20s
Run mypy on Lib/tomllib	16s
Run mypy on Tools/jit	16s
Run mypy on Tools/peg_generator	18s
Run mypy on Tools/cases_generator	15s
	2m 21s

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