build(deps-dev): bump postcss from 8.4.38 to 8.4.39

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](postcss/postcss@8.4.38...8.4.39)

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

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

Author: dependabot[bot]

package-lock.json

@@ -16,7 +16,7 @@
   "devDependencies": {
     "@vitest/coverage-v8": "^1.6.0",
     "np": "^10.0.6",
-    "postcss": "^8.4.38",
+    "postcss": "^8.4.39",
     "tailwindcss": "^3.4.4",
     "vitest": "^1.3.0"
   },