chore(deps): update dependency postcss to v8.5.6 (#107960)

Update dependency postcss to v8.5.6

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

package.json

@@ -227,7 +227,7 @@
     "pa11y-ci": "^3.1.0",
     "pdf-parse": "^1.1.1",
     "plop": "^4.0.1",
-    "postcss": "8.5.1",
+    "postcss": "8.5.6",
     "postcss-loader": "8.1.1",
     "postcss-reporter": "7.1.0",
     "postcss-scss": "4.0.9",

yarn.lock

@@ -18381,7 +18381,7 @@ __metadata:
     pdf-parse: "npm:^1.1.1"
     plop: "npm:^4.0.1"
     pluralize: "npm:^8.0.0"
-    postcss: "npm:8.5.1"
+    postcss: "npm:8.5.6"
     postcss-loader: "npm:8.1.1"
     postcss-reporter: "npm:7.1.0"
     postcss-scss: "npm:4.0.9"
@@ -23320,7 +23320,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"nanoid@npm:^3.3.11, nanoid@npm:^3.3.8":
+"nanoid@npm:^3.3.11":
   version: 3.3.11
   resolution: "nanoid@npm:3.3.11"
   bin:
@@ -25771,18 +25771,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.5.1":
-  version: 8.5.1
-  resolution: "postcss@npm:8.5.1"
-  dependencies:
-    nanoid: "npm:^3.3.8"
-    picocolors: "npm:^1.1.1"
-    source-map-js: "npm:^1.2.1"
-  checksum: 10/1fbd28753143f7f03e4604813639918182b15343c7ad0f4e72f3875fc2cc0b8494c887f55dc05008fad5fbf1e1e908ce2edbbce364a91f84dcefb71edf7cd31d
-  languageName: node
-  linkType: hard
-
-"postcss@npm:^8.4.33, postcss@npm:^8.4.40, postcss@npm:^8.5.1":
+"postcss@npm:8.5.6, postcss@npm:^8.4.33, postcss@npm:^8.4.40, postcss@npm:^8.5.1":
   version: 8.5.6
   resolution: "postcss@npm:8.5.6"
   dependencies: