Bump mini-css-extract-plugin from 2.7.6 to 2.8.1 (#7061)

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 2.7.6 to 2.8.1.
- [Release notes](https://github.com/webpack-contrib/mini-css-extract-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/mini-css-extract-plugin/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/mini-css-extract-plugin@v2.7.6...v2.8.1)

---
updated-dependencies:
- dependency-name: mini-css-extract-plugin
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -81,7 +81,7 @@
     "express": "~4.18.2",
     "html-webpack-plugin": "~5.6.0",
     "jsdom": "~23.0.1",
-    "mini-css-extract-plugin": "~2.7.6",
+    "mini-css-extract-plugin": "~2.8.1",
     "mocha": "~10.2.0",
     "nib": "~1.2.0",
     "nyc": "~15.1.0",