Bump css-loader from 5.2.7 to 6.9.0 (#3166)

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.2.7 to 6.9.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v5.2.7...v6.9.0)

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

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

package.json

@@ -147,7 +147,7 @@
     "babel-plugin-require-context-hook": "^1.0.0",
     "backpack-node-sass": "^1.1.1",
     "core-js": "^3.0.0",
-    "css-loader": "^5.2.7",
+    "css-loader": "^6.9.0",
     "d3-scale": "^4.0.2",
     "danger": "^11.2.0",
     "date-fns": "^2.28.0",