build(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

@@ -47,7 +47,7 @@
     "husky": "^8.0.0",
     "jsdom": "^22.1.0",
     "lint-staged": "^14.0.1",
-    "postcss": "^8.4.29",
+    "postcss": "^8.4.31",
     "postcss-styled": "^0.34.0",
     "postcss-styled-syntax": "^0.4.0",
     "postcss-syntax": "^0.36.2",

yarn.lock

@@ -8445,7 +8445,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.4.31":
+"postcss@npm:8.4.31, postcss@npm:^8.4.31":
   version: 8.4.31
   resolution: "postcss@npm:8.4.31"
   dependencies:
@@ -8456,7 +8456,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:^8.4.23, postcss@npm:^8.4.25, postcss@npm:^8.4.27, postcss@npm:^8.4.29":
+"postcss@npm:^8.4.23, postcss@npm:^8.4.25, postcss@npm:^8.4.27":
   version: 8.4.29
   resolution: "postcss@npm:8.4.29"
   dependencies:
@@ -10871,7 +10871,7 @@ __metadata:
     husky: ^8.0.0
     jsdom: ^22.1.0
     lint-staged: ^14.0.1
-    postcss: ^8.4.29
+    postcss: ^8.4.31
     postcss-styled: ^0.34.0
     postcss-styled-syntax: ^0.4.0
     postcss-syntax: ^0.36.2