[BUG] Ensure autolink reference doesn't error when repo is renamed

[deiga]

Addresses #3180 for github_repository_autolink_reference

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Before the change?

• Renaming a repository caused an existing github_repository_autolink_reference to be re-created and throw an error

After the change?

• Renaming a repository does not cause an error in github_repository_autolink_reference

Pull request checklist

• Schema migrations have been created if needed (example)
• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes
• No

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[github-actions]

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