chore(deps-dev): bump mini-css-extract-plugin from 2.7.5 to 2.7.6 (#8708)

Bumps [mini-css-extract-plugin](https://github.com/webpack-contrib/mini-css-extract-plugin) from 2.7.5 to 2.7.6.
- [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](https://github.com/webpack-contrib/mini-css-extract-plugin/compare/v2.7.5...v2.7.6)

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

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

package.json

@@ -156,7 +156,7 @@
     "license-checker": "^25.0.0",
     "lint-staged": "^13.2.2",
     "local-web-server": "^5.3.0",
-    "mini-css-extract-plugin": "^2.7.5",
+    "mini-css-extract-plugin": "^2.7.6",
     "mocha": "=8.4.0",
     "npm-audit-ci-wrapper": "^3.0.2",
     "npm-run-all": "^4.1.5",