Update 104-accessibility.md (#1002)

* Update 104-accessibility.md

What I did: added new resource item
Why I chose it: Helped me several times to find a) a starting point on how to build an accessible web experience regarding a specific component and b) provides usually links with in-depth examples

* Update content/roadmaps/100-frontend/content/101-html/104-accessibility.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/100-frontend/content/101-html/104-accessibility.md

@@ -5,3 +5,4 @@ Web accessibility means that websites, tools, and technologies are designed and
 <BadgeLink badgeText='Watch' href='https://youtube.com/playlist?list=PLNYkxOF6rcICWx0C9LVWWVqvHlYJyqw7g'>Complete Playlist on Accessibility</BadgeLink>
 <BadgeLink badgeText='Read' colorScheme='yellow' href='https://www.w3schools.com/accessibility/index.php'>Accessibility Tutorial
 </BadgeLink>
+<BadgeLink badgeText='Read' colorScheme='yellow' href='https://www.smashingmagazine.com/2021/03/complete-guide-accessible-front-end-components/'>A Complete Guide To Accessible Front-End Components</BadgeLink>