chore(deps-dev): bump msw from 2.12.7 to 2.12.9 in /webapp

Bumps [msw](https://github.com/mswjs/msw) from 2.12.7 to 2.12.9.
- [Release notes](https://github.com/mswjs/msw/releases)
- [Changelog](https://github.com/mswjs/msw/blob/main/CHANGELOG.md)
- [Commits](mswjs/msw@v2.12.7...v2.12.9)

---
updated-dependencies:
- dependency-name: msw
  dependency-version: 2.12.9
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]