chore(deps): update dependency postcss to v8.3.1 (#42426)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

tools/ui-components/package-lock.json

@@ -10386,9 +10386,9 @@
       "dev": true
     },
     "postcss": {
-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.0.tgz",
-      "integrity": "sha512-+ogXpdAjWGa+fdYY5BQ96V/6tAo+TdSSIMP5huJBIygdWwKtVoB5JWZ7yUd4xZ8r+8Kvvx4nyg/PQ071H4UtcQ==",
+      "version": "8.3.1",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.1.tgz",
+      "integrity": "sha512-9qH0MGjsSm+fjxOi3GnwViL1otfi7qkj+l/WX5gcRGmZNGsIcqc+A5fBkE6PUobEQK4APqYVaES+B3Uti98TCw==",
       "dev": true,
       "requires": {
         "colorette": "^1.2.2",

tools/ui-components/package.json

@@ -32,7 +32,7 @@
     "@testing-library/react": "11.2.7",
     "autoprefixer": "10.2.6",
     "babel-loader": "8.2.2",
-    "postcss": "8.3.0",
+    "postcss": "8.3.1",
     "postcss-import": "14.0.2",
     "tailwindcss": "2.1.4"
   },