mypy

gh-148909: Fix broken author attribution URL in 'The Python 2.3 Metho… #22187

Job	Run time
Run mypy on Tools/peg_generator	17s
Run mypy on Tools/jit	19s
Run mypy on Tools/cases_generator	18s
Run mypy on Lib/_pyrepl	21s
Run mypy on Tools/check-c-api-docs	20s
Run mypy on Lib/tomllib	19s
Run mypy on Lib/test/libregrtest	20s
Run mypy on Tools/clinic	18s
Run mypy on Tools/build	18s
	2m 50s

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