Update dependency react-github-btn to v1.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
react-github-btn (source)	1.3.0 -> 1.4.0

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Release Notes

buttons/react-github-btn

### [`v1.4.0`](https://togithub.com/buttons/react-github-btn/compare/v1.3.0...v1.4.0) [Compare Source](https://togithub.com/buttons/react-github-btn/compare/v1.3.0...v1.4.0)

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Configuration

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🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, click this checkbox.

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