[3.9] bpo-42576: Clarify only debug builds are affected in news (GH-23663)#23666

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miss-islington merged 1 commit intopython:3.9from

miss-islington:backport-6a7fb9d-3.9

Dec 6, 2020

Commits on Dec 6, 2020

bpo-42576: Clarify only debug builds are affected in news (GH-23663)

Fidget-Spinner
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miss-islington
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