remove incorrect reference to `redirect_uri`

[akorzynski]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/generating-a-user-access-token-for-a-github-app

What part(s) of the article would you like to see updated?

redirect_uri is not a parameter to the call that exchanges the OAuth2 code for the token. It's a parameter to an earlier call: the one that redirects the user back to the app.

Additional information

No response

[welcome]

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[nguyenalex836]

@akorzynski Thank you for opening an issue and linking it to your PR! ✨