mypy

gh-148763: Fix paramter name in `multiprocessing.connection.send_byte… #20796

Job	Run time
Run mypy on Tools/peg_generator	16s
Run mypy on Tools/check-c-api-docs	15s
Run mypy on Lib/test/libregrtest	17s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/jit	17s
Run mypy on Tools/clinic	20s
Run mypy on Tools/cases_generator	17s
Run mypy on Lib/_pyrepl	15s
Run mypy on Tools/build	16s
	2m 30s

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