Build(deps-dev): Bump postcss from 8.4.38 to 8.4.39 (#40602)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.38 to 8.4.39.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.4.38...8.4.39)

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

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

package.json

@@ -143,7 +143,7 @@
     "lockfile-lint": "^4.14.0",
     "nodemon": "^3.1.4",
     "npm-run-all2": "^6.2.0",
-    "postcss": "^8.4.38",
+    "postcss": "^8.4.39",
     "postcss-cli": "^11.0.0",
     "rollup": "^4.18.0",
     "rollup-plugin-istanbul": "^5.0.0",