mypy

statistics: Fix geometric_mean() error message for negative inputs (#… #21022

Job	Run time
Run mypy on Tools/jit	20s
Run mypy on Tools/clinic	17s
Run mypy on Lib/_pyrepl	19s
Run mypy on Tools/cases_generator	12s
Run mypy on Lib/test/libregrtest	21s
Run mypy on Tools/check-c-api-docs	12s
Run mypy on Lib/tomllib	16s
Run mypy on Tools/build	20s
Run mypy on Tools/peg_generator	22s
	2m 39s

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