mypy

gh-148683: Doc: fix misplaced pprint entries in What's New 3.15 (#148… #20765

Job	Run time
Run mypy on Tools/clinic	31s
Run mypy on Lib/_pyrepl	18s
Run mypy on Lib/tomllib	16s
Run mypy on Lib/test/libregrtest	17s
Run mypy on Tools/jit	20s
Run mypy on Tools/build	21s
Run mypy on Tools/check-c-api-docs	18s
Run mypy on Tools/cases_generator	21s
Run mypy on Tools/peg_generator	29s
	3m 11s

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