docs: fix duplicated word in Copilot review guide

[raulkolaric]

Why:

The article contains a duplicated word that makes the sentence grammatically incorrect.

No linked issue; this is a minor typo correction.

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

This change removes the duplicated word “use” from the following sentence:

When you request a review from Copilot, you'll be learning the same process that you'll use use when ...

The corrected sentence reads:

When you request a review from Copilot, you'll be learning the same process that you'll use when ...

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

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Table of review links

Note: Please update the URL for your staging server or codespace.

The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
get-started/learning-to-code/getting-feedback-on-your-code-from-github-copilot.md	fpt	fpt

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

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[subatoi]

Thanks for spotting that and submitting a PR, @raulkolaric — I'll get this merged now 🙇

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