Bump webpack-assets-manifest from 4.0.2 to 4.0.4 (#16025)

Bumps [webpack-assets-manifest](https://github.com/webdeveric/webpack-assets-manifest) from 4.0.2 to 4.0.4.
- [Release notes](https://github.com/webdeveric/webpack-assets-manifest/releases)
- [Commits](https://github.com/webdeveric/webpack-assets-manifest/compare/v4.0.2...v4.0.4

)

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