Bump postcss-preset-env from 9.3.0 to 9.4.0

Bumps [postcss-preset-env](https://github.com/csstools/postcss-plugins/tree/HEAD/plugin-packs/postcss-preset-env) from 9.3.0 to 9.4.0.
- [Changelog](https://github.com/csstools/postcss-plugins/blob/main/plugin-packs/postcss-preset-env/CHANGELOG.md)
- [Commits](https://github.com/csstools/postcss-plugins/commits/HEAD/plugin-packs/postcss-preset-env)

---
updated-dependencies:
- dependency-name: postcss-preset-env
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -87,7 +87,7 @@
     "postcss-loader": "^8.1.0",
     "postcss-mixins": "^9.0.4",
     "postcss-nested": "^6.0.1",
-    "postcss-preset-env": "^9.3.0",
+    "postcss-preset-env": "^9.4.0",
     "postcss-simple-vars": "^7.0.1",
     "postcss-url": "^10.1.3",
     "prettier": "^3.1.0",