docs(readme): examples use ESM

[oscard0m]

No issue for this doc adjustment

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Behavior

Before the change?

code examples in README.md use CommonJS

After the change?

code examples in README.md use ESM

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Additional info

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)
• Added the appropriate label for the given change

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes (Please add the Type: Breaking change label)
• No

If Yes, what's the impact:

• N/A

Pull request type

Type: Documentation

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[gr2m]

I'm not sure if we should do this? Did we already update the examples in other places? Sorry if I missed a discussion about it

[oscard0m]

I'm not sure if we should do this? Did we already update the examples in other places? Sorry if I missed a discussion about it

As far as I know, we have not changed examples in other places and no discussion yet.

I assumed this could be changed because of this #586 but I'm creating the proper discussion to talk about this: octokit/octokit.js#2491