build(deps): bump postcss-loader from 7.2.4 to 7.3.0 (#1720)

Bumps [postcss-loader](https://github.com/webpack-contrib/postcss-loader) from 7.2.4 to 7.3.0.
- [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/v7.2.4...v7.3.0)

---
updated-dependencies:
- dependency-name: postcss-loader
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -81,7 +81,7 @@
         "navigator.locks": "^0.8.6",
         "postcss": "^8.4.23",
         "postcss-flexbugs-fixes": "^5.0.2",
-        "postcss-loader": "^7.2.4",
+        "postcss-loader": "^7.3.0",
         "postcss-normalize": "^10.0.1",
         "postcss-preset-env": "^8.3.2",
         "prompts": "^2.4.2",