Update dependency postcss to v8.5.8

Author: renovate[bot]

package.json

@@ -37,7 +37,7 @@
     "globals": "17.3.0",
     "handlebars-loader": "1.7.3",
     "mini-css-extract-plugin": "2.10.0",
-    "postcss": "8.5.6",
+    "postcss": "8.5.8",
     "postcss-loader": "8.2.1",
     "postcss-preset-env": "11.2.0",
     "postcss-scss": "4.0.9",

yarn.lock

@@ -4563,7 +4563,7 @@ __metadata:
     jquery: "npm:4.0.0"
     lodash: "npm:4.17.23"
     mini-css-extract-plugin: "npm:2.10.0"
-    postcss: "npm:8.5.6"
+    postcss: "npm:8.5.8"
     postcss-loader: "npm:8.2.1"
     postcss-preset-env: "npm:11.2.0"
     postcss-scss: "npm:4.0.9"
@@ -6244,14 +6244,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.5.6, postcss@npm:^8.4.40, postcss@npm:^8.5.6":
-  version: 8.5.6
-  resolution: "postcss@npm:8.5.6"
+"postcss@npm:8.5.8, postcss@npm:^8.4.40, postcss@npm:^8.5.6":
+  version: 8.5.8
+  resolution: "postcss@npm:8.5.8"
   dependencies:
     nanoid: "npm:^3.3.11"
     picocolors: "npm:^1.1.1"
     source-map-js: "npm:^1.2.1"
-  checksum: 10c0/5127cc7c91ed7a133a1b7318012d8bfa112da9ef092dddf369ae699a1f10ebbd89b1b9f25f3228795b84585c72aabd5ced5fc11f2ba467eedf7b081a66fad024
+  checksum: 10c0/dd918f7127ee7c60a0295bae2e72b3787892296e1d1c3c564d7a2a00c68d8df83cadc3178491259daa19ccc54804fb71ed8c937c6787e08d8bd4bedf8d17044c
   languageName: node
   linkType: hard