chore: bump webpack from 5.94.0 to 5.104.1 in /bpmn-js-plugin-example

Bumps [webpack](https://github.com/webpack/webpack) from 5.94.0 to 5.104.1.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Changelog](https://github.com/webpack/webpack/blob/main/CHANGELOG.md)
- [Commits](webpack/webpack@v5.94.0...v5.104.1)

---
updated-dependencies:
- dependency-name: webpack
  dependency-version: 5.104.1
  dependency-type: direct:development
...

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Author: dependabot[bot]