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>

package.json

@@ -66,7 +66,7 @@
     "eslint-plugin-prettier": "5.1.3",
     "eslint-plugin-vue": "9.26.0",
     "licensee": "10.0.0",
-    "postcss": "8.4.38",
+    "postcss": "8.4.39",
     "postcss-css-variables": "0.19.0",
     "postcss-import": "16.1.0",
     "postcss-nested": "6.0.1",