chore: update roadmap content json (#6694)

Co-authored-by: kamranahmedse <kamranahmedse@users.noreply.github.com>

public/roadmap-content/react.json

@@ -936,7 +936,7 @@
   },
   "thfnymb_UIiKxakKfiua5": {
     "title": "Component / Libraries",
-    "description": "",
+    "description": "React component libraries are collections of pre-built, reusable components that can be used to speed up the development process. They can be styled using CSS in various ways, including traditional CSS files, CSS modules, and CSS-in-JS solutions like styled-components.",
     "links": []
   },
   "akVNUPOqaTXaSHoQFlkP_": {