Bump css-loader from 5.2.4 to 5.2.6

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.2.4 to 5.2.6.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/css-loader/compare/v5.2.4...v5.2.6)

---
updated-dependencies:
- dependency-name: css-loader
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -20,7 +20,7 @@
     "clean-webpack-plugin": "^3.0.0",
     "confusing-browser-globals": "^1.0.10",
     "copy-webpack-plugin": "^8.1.0",
-    "css-loader": "^5.2.4",
+    "css-loader": "^5.2.6",
     "cssnano": "^4.1.10",
     "eslint": "^7.28.0",
     "eslint-plugin-compat": "^3.9.0",