Fix typos in Objects/odictobject.c documentation

[robertzk]

This fixes two tpyos in comments in the file implementing OrderedDict.

[the-knights-who-say-ni]

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[robertzk]

See CLA:

Contributor Agreement - signed.pdf

[robertzk]

@taleinat Thank you! Is this good to merge? 😇

[taleinat]

@robertzk, we're only waiting for approval of your signed contributor agreement.

[robertzk]

@taleinat thank you! I just received this email:

Hi Robert,

All of the CLA bits are taken care of now. A committer needed to remove the CLA not signed label so that the verification bot could add the CLA signed label. So you're all set now except for final review of the changes.

Cheers,

Betsy

[miss-islington]

Thanks @robertzk for the PR, and @taleinat for merging it 🌮🎉.. I'm working now to backport this PR to: 3.6, 3.7.
🐍🍒⛏🤖

[bedevere-bot]

GH-8137 is a backport of this pull request to the 3.7 branch.

[bedevere-bot]

GH-8138 is a backport of this pull request to the 3.6 branch.