Bump webpack from 5.74.0 to 5.88.2 in /samples/demo/client (#600)

Bumps [webpack](https://github.com/webpack/webpack) from 5.74.0 to 5.88.2.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v5.74.0...v5.88.2)

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

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