Bump webpack from 5.91.0 to 5.104.1 in /assets

Bumps [webpack](https://github.com/webpack/webpack) from 5.91.0 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@v5.91.0...v5.104.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

assets/package.json

@@ -19,6 +19,6 @@
     "css-minimizer-webpack-plugin": "^6.0.0",
     "mini-css-extract-plugin": "^2.8.1",
     "webpack-cli": "^5.1.4",
-    "webpack": "5.91.0"
+    "webpack": "5.104.1"
   }
 }