build: update dependency postcss to v8.5.12

See associated pull request for more information.

Closes angular#33068 as a pr takeover

Author: alan-agius4

packages/angular/build/package.json

@@ -55,7 +55,7 @@
     "jsdom": "28.1.0",
     "less": "4.4.2",
     "ng-packagr": "21.2.3",
-    "postcss": "8.5.6",
+    "postcss": "8.5.12",
     "rxjs": "7.8.2",
     "vitest": "4.0.18"
   },

packages/angular/ssr/test/npm_package/THIRD_PARTY_LICENSES.txt.golden

@@ -449,7 +449,7 @@ License: MIT
 
 The MIT License (MIT)
 
-Copyright 2013 Andrey Sitnik <andrey@sitnik.ru>
+Copyright 2013 Andrey Sitnik <andrey@sitnik.es>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in

packages/angular_devkit/build_angular/package.json

@@ -42,7 +42,7 @@
     "ora": "9.3.0",
     "picomatch": "4.0.4",
     "piscina": "5.1.4",
-    "postcss": "8.5.6",
+    "postcss": "8.5.12",
     "postcss-loader": "8.2.0",
     "resolve-url-loader": "5.0.0",
     "rxjs": "7.8.2",