Update dependency @testing-library/react to v15

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@testing-library/react	14.3.0 -> 15.0.0

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Release Notes

testing-library/react-testing-library (@​testing-library/react)

### [`v15.0.0`](https://togithub.com/testing-library/react-testing-library/compare/v14.3.0...787cb85f8baa3d2e2a9916b7dad12c0a76d787a4) [Compare Source](https://togithub.com/testing-library/react-testing-library/compare/v14.3.1...v15.0.0) ### [`v14.3.1`](https://togithub.com/testing-library/react-testing-library/releases/tag/v14.3.1) [Compare Source](https://togithub.com/testing-library/react-testing-library/compare/v14.3.0...v14.3.1) ##### Bug Fixes - Stop using nullish coalescing ([#​1300](https://togithub.com/testing-library/react-testing-library/issues/1300)) ([8434a24](https://togithub.com/testing-library/react-testing-library/commit/8434a24ce79583d1359f58563c5f3981e729eb1c))

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Configuration

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