chore(deps): update dependency postcss to v8.4.28

Author: renovate[bot]

package.json

@@ -65,7 +65,7 @@
     "autoprefixer": "10.4.14",
     "clsx": "^1.2.1",
     "less": "4.1.3",
-    "postcss": "8.4.21",
+    "postcss": "8.4.28",
     "postcss-import": "15.1.0",
     "prettier": "2.8.7",
     "tailwindcss": "3.2.7",