Bump yaml and postcss-loader in /catalog

Removes [yaml](https://github.com/eemeli/yaml). It's no longer used after updating ancestor dependency [postcss-loader](https://github.com/webpack-contrib/postcss-loader). These dependencies need to be updated together.


Removes `yaml`

Updates `postcss-loader` from 6.2.1 to 7.2.4
- [Release notes](https://github.com/webpack-contrib/postcss-loader/releases)
- [Changelog](https://github.com/webpack-contrib/postcss-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/postcss-loader/compare/v6.2.1...v7.2.4)

---
updated-dependencies:
- dependency-name: yaml
  dependency-type: indirect
- dependency-name: postcss-loader
  dependency-type: direct:development
...

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

catalog/package.json

@@ -40,7 +40,7 @@
         "mini-css-extract-plugin": "^2.6.0",
         "mocha": "^9.2.1",
         "path": "^0.12.7",
-        "postcss-loader": "^6.2.1",
+        "postcss-loader": "^7.2.4",
         "querystring-es3": "^0.2.1",
         "raw-loader": "^4.0.2",
         "sass": "^1.49.9",