build: update dependency postcss to v8.4.31 [security]

Author: angular-robot

packages/angular_devkit/build_angular/package.json

@@ -51,7 +51,7 @@
     "parse5-html-rewriting-stream": "7.0.0",
     "picomatch": "2.3.1",
     "piscina": "4.1.0",
-    "postcss": "8.4.30",
+    "postcss": "8.4.31",
     "postcss-loader": "7.3.3",
     "resolve-url-loader": "5.0.0",
     "rxjs": "7.8.1",

yarn.lock

@@ -10229,7 +10229,7 @@ postcss@8.4.30:
     picocolors "^1.0.0"
     source-map-js "^1.0.2"
 
-postcss@^8.2.14, postcss@^8.4.16, postcss@^8.4.21, postcss@^8.4.23, postcss@^8.4.27:
+postcss@8.4.31, postcss@^8.2.14, postcss@^8.4.16, postcss@^8.4.21, postcss@^8.4.23, postcss@^8.4.27:
   version "8.4.31"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.31.tgz#92b451050a9f914da6755af352bdc0192508656d"
   integrity sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==