Bump @stryker-mutator/jest-runner from 9.3.0 to 9.4.0 in /react

Bumps [@stryker-mutator/jest-runner](https://github.com/stryker-mutator/stryker-js/tree/HEAD/packages/jest-runner) from 9.3.0 to 9.4.0.
- [Release notes](https://github.com/stryker-mutator/stryker-js/releases)
- [Changelog](https://github.com/stryker-mutator/stryker-js/blob/master/packages/jest-runner/CHANGELOG.md)
- [Commits](https://github.com/stryker-mutator/stryker-js/commits/v9.4.0/packages/jest-runner)

---
updated-dependencies:
- dependency-name: "@stryker-mutator/jest-runner"
  dependency-version: 9.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]