Bump postcss from 8.4.14 to 8.4.16 (#5998)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -401,7 +401,7 @@
     "node-loader": "^2.0.0",
     "nodemon": "^2.0.19",
     "playwright": "^1.24.2",
-    "postcss": "^8.4.14",
+    "postcss": "^8.4.16",
     "postcss-loader": "^6.2.1",
     "randomcolor": "^0.6.2",
     "react-beautiful-dnd": "^13.1.0",