Fix CSS url in node (#2873)

Changed the legacy version of freecodecamp's responsive web design course to the present one.

content/roadmaps/101-backend/content/101-basic-frontend/101-css.md

@@ -4,7 +4,7 @@ CSS or Cascading Style Sheets is the language used to style the frontend of any
 
 <ResourceGroupTitle>Free Content</ResourceGroupTitle>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.w3schools.com/css/'>W3Schools — Learn CSS</BadgeLink>
-<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.freecodecamp.org/learn/responsive-web-design/'>freeCodeCamp — Responsive Web Design</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.freecodecamp.org/learn/2022/responsive-web-design'>freeCodeCamp — Responsive Web Design</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://learn.shayhowe.com/html-css/building-your-first-web-page/'>Learn to Code HTML & CSS</BadgeLink>
 <BadgeLink colorScheme='green' badgeText='Course' href='https://flexbox.io/'>What The Flexbox!</BadgeLink>
 <BadgeLink colorScheme='green' badgeText='Course' href='https://www.codecademy.com/learn/learn-css'>Learn CSS | Codecademy</BadgeLink>