fix(pkg): pin @octokit/core peerDependency to v5

[DanCurryy]

Resolves #597

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Before the change?

• Octokit/core@6 is now ESM, which while this version is still CJS can't pull in and use.

After the change?

• Pinning this back to Octokit/core@5 where it remains CJS fixes this.

Pull request checklist

• 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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[github-actions]

🎉 This PR is included in version 9.2.1 🎉

The release is available on:

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• npm package (@latest dist-tag)

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[github-actions]

🎉 This PR is included in version 10.0.0-beta.4 🎉

The release is available on:

• GitHub release
• npm package (@beta dist-tag)

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[github-actions]

🎉 This PR is included in version 9.2.1 🎉

The release is available on:

• GitHub release
• npm package (@release-9.x dist-tag)

Your semantic-release bot 📦🚀