chore(docs): bump @playwright/test in /web-app/tests

Bumps [@playwright/test](https://github.com/microsoft/playwright) from 1.50.1 to 1.51.1.
- [Release notes](https://github.com/microsoft/playwright/releases)
- [Commits](microsoft/playwright@v1.50.1...v1.51.1)

---
updated-dependencies:
- dependency-name: "@playwright/test"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]