Update index.tsx

Author: sivaprasath2004

src/data/courses/index.tsx

@@ -349,7 +349,7 @@ const courses = [
       "id": 40,
       "title": "C Language",
       "description": "This course is for absolute beginners who want to learn C Language.",
-      "category": "figma",
+      "category": "c-language",
       "imageUrl": "/img/svg/developer_activity.svg",
       "author": "Ajay Dhangar",
       "link": "/courses/category/c-language"