Bump postcss-loader from 7.3.3 to 7.3.4

Bumps [postcss-loader](https://github.com/webpack-contrib/postcss-loader) from 7.3.3 to 7.3.4.
- [Release notes](https://github.com/webpack-contrib/postcss-loader/releases)
- [Changelog](https://github.com/webpack-contrib/postcss-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/postcss-loader@v7.3.3...v7.3.4)

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

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

package.json

@@ -119,7 +119,7 @@
     "mini-css-extract-plugin": "~2.7.6",
     "nyc": "~15.1.0",
     "postcss": "~8.4.32",
-    "postcss-loader": "~7.3.3",
+    "postcss-loader": "~7.3.4",
     "prettier": "~3.0.3",
     "puppeteer": "~21.2.1",
     "regenerator-runtime": "~0.14.0",