Duplicated content on creating repository wide custom instructions for copilot

[mattbrannon]

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/copilot/how-tos/configure-custom-instructions/add-repository-instructions

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

The section creating repository wide custom instructions repeats the same line twice.

Additional information

No response

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