Update dependency postcss to v8.5.6

Author: renovate[bot]

yarn.lock

@@ -11770,13 +11770,13 @@ __metadata:
   linkType: hard
 
 "postcss@npm:^8.2.14, postcss@npm:^8.2.4, postcss@npm:~8.5.1":
-  version: 8.5.5
-  resolution: "postcss@npm:8.5.5"
+  version: 8.5.6
+  resolution: "postcss@npm:8.5.6"
   dependencies:
     nanoid: "npm:^3.3.11"
     picocolors: "npm:^1.1.1"
     source-map-js: "npm:^1.2.1"
-  checksum: 10/c80f723c754b656bf7c983e34841fa35fe0c37a13edd27e24de64e7962cfab11ea081b3b1c900838d2dbe576a045fdecad4f17862c488f12735742f525d22cf0
+  checksum: 10/9e4fbe97574091e9736d0e82a591e29aa100a0bf60276a926308f8c57249698935f35c5d2f4e80de778d0cbb8dcffab4f383d85fd50c5649aca421c3df729b86
   languageName: node
   linkType: hard