[3.10] Fix dataclassses spelling (GH-28837)

[miss-islington]

(cherry picked from commit 5b4a767)

Co-authored-by: Landon Yarrington 33426811+jly36963@users.noreply.github.com

Automerge-Triggered-By: GH:ericvsmith

[the-knights-who-say-ni]

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[miss-islington]

@jly36963 and @ericvsmith: Status check is done, and it's a success ✅ .

[miss-islington]

Thanks @miss-islington for the PR, and @ericvsmith for merging it 🌮🎉.. I'm working now to backport this PR to: 3.9.
🐍🍒⛏🤖

[miss-islington]

Sorry, @miss-islington and @ericvsmith, I could not cleanly backport this to 3.9 due to a conflict.
Please backport using cherry_picker on command line.
cherry_picker e086bfee035eb23397f3cddba07b767b35d7ec08 3.9