Bump @wdio/reporter from 8.15.0 to 8.15.7 (#227)

Bumps [@wdio/reporter](https://github.com/webdriverio/webdriverio/tree/HEAD/packages/wdio-reporter) from 8.15.0 to 8.15.7.
- [Release notes](https://github.com/webdriverio/webdriverio/releases)
- [Changelog](https://github.com/webdriverio/webdriverio/blob/main/CHANGELOG.md)
- [Commits](https://github.com/webdriverio/webdriverio/commits/v8.15.7/packages/wdio-reporter)

---
updated-dependencies:
- dependency-name: "@wdio/reporter"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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