Update add-repository-instructions.md

[NilsNathorst]

Why:

Closes: No existing issue — this is a minor typo fix

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

This PR fixes a small documentation typo in add-repository-instructions.md, correcting the duplicated word "and and" to the proper "and".
This change improves clarity in the README instructions without affecting any functionality.

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.

[Copilot]

Pull request overview

This PR corrects a simple typographical error in the Copilot custom instructions documentation, replacing the duplicated phrase "and and" with the correct single "and".

Key Changes:

• Fixed a typo in add-repository-instructions.md where "and and" was duplicated

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[github-actions]

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Table of review links

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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
copilot/how-tos/configure-custom-instructions/add-repository-instructions.md	fpt ghec	fpt ghec

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

🤖 This comment is automatically generated.

[Sharra-writes]

@NilsNathorst Looks good, thanks!

[github-actions]

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