Corrected context window sizes for o1-preview and o1-mini models

[carloshvp]

The correct values are taken from the official models pages: https://github.com/marketplace/models/azure-openai/o1-preview https://github.com/marketplace/models/azure-openai/o1-mini

Why:

Closes: #34911

What's being changed (if available, include any code snippets, screenshots, or gifs):

Corrected context window sizes, according to official model pages referred
https://github.com/marketplace/models/azure-openai/o1-preview
https://github.com/marketplace/models/azure-openai/o1-mini

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[github-actions]

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The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

You may find it useful to copy this table into the pull request summary. There you can edit it to share links to important articles or changes and to give a high-level overview of how the changes in your pull request support the overall goals of the pull request.

Source	Preview	Production	What Changed
github-models/prototyping-with-ai-models.md	fpt ghec	fpt ghec

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fpt: Free, Pro, Team
ghec: GitHub Enterprise Cloud
ghes: GitHub Enterprise Server

[nguyenalex836]

@carloshvp Thanks so much for opening a PR! I'll get this triaged for review ✨

[github-actions]

Thanks for opening a pull request! We've triaged this issue for technical review by a subject matter expert 👀

[matthewisabel]

Thanks for suggesting this change. I think we need to make our docs clearer as these are the service limits when the service is provided without costs on GitHub Models. While the models do support a larger context window, the service constrains the number of tokens when users are using the free service. I'll make a future docs PR to make the clearer around this table.

[carloshvp]

Thank you @matthewisabel for the clarification. Should I close this PR then?

[nguyenalex836]

@carloshvp I'll go ahead and close this 💛 Thank you so much for your willingness to contribute to our docs!

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