Bump jest from 30.0.5 to 30.1.2 in /src/Elastic.Documentation.Site (#1802)

Bumps [jest](https://github.com/jestjs/jest/tree/HEAD/packages/jest) from 30.0.5 to 30.1.2.
- [Release notes](https://github.com/jestjs/jest/releases)
- [Changelog](https://github.com/jestjs/jest/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jestjs/jest/commits/HEAD/packages/jest)

---
updated-dependencies:
- dependency-name: jest
  dependency-version: 30.1.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]