chore(deps): bump webpack in /guides/drain-safe-app/app

Bumps [webpack](https://github.com/webpack/webpack) from 5.75.0 to 5.90.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v5.75.0...v5.90.0)

---
updated-dependencies:
- dependency-name: webpack
  dependency-type: indirect
...

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