mypy

gh-141721: Improve docstring for LastUpdatedOrderedDict example (gh14… #18057

Job	Run time
Run mypy on Lib/test/libregrtest	24s
Run mypy on Lib/_pyrepl	19s
Run mypy on Lib/tomllib	20s
Run mypy on Tools/build	18s
Run mypy on Tools/clinic	17s
Run mypy on Tools/cases_generator	19s
Run mypy on Tools/jit	20s
Run mypy on Tools/peg_generator	22s
	2m 39s

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