Bump webpack from 5.69.1 to 5.99.8 in /frontend

Bumps [webpack](https://github.com/webpack/webpack) from 5.69.1 to 5.99.8.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v5.69.1...v5.99.8)

---
updated-dependencies:
- dependency-name: webpack
  dependency-version: 5.99.8
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]