chore(deps): bump postcss from 8.4.20 to 8.4.31

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.20 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@8.4.20...8.4.31)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: indirect
...

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

yarn.lock

@@ -3487,15 +3487,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"nanoid@npm:^3.3.4":
-  version: 3.3.4
-  resolution: "nanoid@npm:3.3.4"
-  bin:
-    nanoid: bin/nanoid.cjs
-  checksum: 2fddd6dee994b7676f008d3ffa4ab16035a754f4bb586c61df5a22cf8c8c94017aadd360368f47d653829e0569a92b129979152ff97af23a558331e47e37cd9c
-  languageName: node
-  linkType: hard
-
 "nanoid@npm:^3.3.6":
   version: 3.3.6
   resolution: "nanoid@npm:3.3.6"
@@ -3809,25 +3800,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:^8.4.20":
-  version: 8.4.20
-  resolution: "postcss@npm:8.4.20"
-  dependencies:
-    nanoid: ^3.3.4
-    picocolors: ^1.0.0
-    source-map-js: ^1.0.2
-  checksum: 1a5609ea1c1b204f9c2974a0019ae9eef2d99bf645c2c9aac675166c4cb1005be7b5e2ba196160bc771f5d9ac896ed883f236f888c891e835e59d28fff6651aa
-  languageName: node
-  linkType: hard
-
-"postcss@npm:^8.4.23":
-  version: 8.4.23
-  resolution: "postcss@npm:8.4.23"
+"postcss@npm:^8.4.20, postcss@npm:^8.4.23":
+  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: 8bb9d1b2ea6e694f8987d4f18c94617971b2b8d141602725fedcc2222fdc413b776a6e1b969a25d627d7b2681ca5aabb56f59e727ef94072e1b6ac8412105a2f
+  checksum: 1d8611341b073143ad90486fcdfeab49edd243377b1f51834dc4f6d028e82ce5190e4f11bb2633276864503654fb7cab28e67abdc0fbf9d1f88cad4a0ff0beea
   languageName: node
   linkType: hard