build: 📦 update dependency postcss to v8.5.6 (#896)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

yarn.lock

@@ -19455,13 +19455,13 @@ __metadata:
   linkType: hard
 
 "postcss@npm:^8.2.14, postcss@npm:^8.4.24, postcss@npm:^8.4.33, postcss@npm:^8.4.38, postcss@npm:^8.4.43, postcss@npm:^8.4.47, postcss@npm:^8.4.49, postcss@npm:^8.5.3":
-  version: 8.5.4
-  resolution: "postcss@npm:8.5.4"
+  version: 8.5.6
+  resolution: "postcss@npm:8.5.6"
   dependencies:
     nanoid: ^3.3.11
     picocolors: ^1.1.1
     source-map-js: ^1.2.1
-  checksum: 7ede5eb54aa56767a61541f13ca9994ce56d93340bc3c99328c741e5cc6c0024510e31667be108e3d29e5189d434ae8476c820e8c0ce90cf942d8a2faf1eb876
+  checksum: 20f3b5d673ffeec2b28d65436756d31ee33f65b0a8bedb3d32f556fbd5973be38c3a7fb5b959a5236c60a5db7b91b0a6b14ffaac0d717dce1b903b964ee1c1bb
   languageName: node
   linkType: hard