chore(deps-dev): bump postcss from 8.4.29 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.29 to 8.4.31.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.29...8.4.31)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -57,7 +57,7 @@
     "eslint-config-prettier": "^9.0.0",
     "husky": "^8.0.3",
     "lint-staged": "^14.0.0",
-    "postcss": "^8.4.21",
+    "postcss": "^8.4.31",
     "postcss-scss": "^4.0.6",
     "prettier": "^3.0.0",
     "stylelint": "^15.2.0",

yarn.lock

@@ -7796,7 +7796,7 @@ __metadata:
     next: ^13.2.1
     next-i18next: ^14.0.0
     observable-hooks: ^4.2.1
-    postcss: ^8.4.21
+    postcss: ^8.4.31
     postcss-scss: ^4.0.6
     prettier: ^3.0.0
     react: 18.2.0
@@ -8647,6 +8647,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"postcss@npm:^8.4.31":
+  version: 8.4.31
+  resolution: "postcss@npm:8.4.31"
+  dependencies:
+    nanoid: ^3.3.6
+    picocolors: ^1.0.0
+    source-map-js: ^1.0.2
+  checksum: 1d8611341b073143ad90486fcdfeab49edd243377b1f51834dc4f6d028e82ce5190e4f11bb2633276864503654fb7cab28e67abdc0fbf9d1f88cad4a0ff0beea
+  languageName: node
+  linkType: hard
+
 "prelude-ls@npm:^1.2.1":
   version: 1.2.1
   resolution: "prelude-ls@npm:1.2.1"