Bump css-loader from 5.0.1 to 6.7.2 in /app

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.0.1 to 6.7.2.
- [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@v5.0.1...v6.7.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

app/package.json

@@ -49,7 +49,7 @@
     "@typescript-eslint/parser": "^5.16.0",
     "babel-loader": "8.2.2",
     "babel-plugin-prismjs": "2.1.0",
-    "css-loader": "5.0.1",
+    "css-loader": "6.7.2",
     "css-modules-typescript-loader": "4.0.1",
     "eslint": "8.11.0",
     "eslint-config-airbnb-base": "15.0.0",