mypy

gh-141510: Update `PyDict_Copy` documentation with note on `frozendic… #10218

Job	Run time
Run mypy on Tools/check-c-api-docs	20s
Run mypy on Tools/build	22s
Run mypy on Tools/peg_generator	22s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Lib/_pyrepl	23s
Run mypy on Tools/clinic	21s
Run mypy on Tools/jit	22s
Run mypy on Tools/cases_generator	18s
Run mypy on Lib/tomllib	18s
	3m 8s

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