Added a New resource to Fetch API (#1365)

* Added a New resource to Fetch API

RapidAPI gives an in-depth explanation of fetch API. what it is, How to use it to process API responses, HTTP Methods with Fetch API and How can errors be handled. Suited For Beginners and the content is packed with real-time examples.

* Update content/roadmaps/100-frontend/content/103-javascript/102-learn-fetch-api-ajax-xhr.md

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

content/roadmaps/100-frontend/content/103-javascript/102-learn-fetch-api-ajax-xhr.md

@@ -4,4 +4,5 @@ Ajax is the technique that lets us send and receive the data asynchronously from
 
 <ResourceGroupTitle>Free Content</ResourceGroupTitle>
 <BadgeLink badgeText='Read' colorScheme="yellow" href='https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API'>Fetch API MDN Docs</BadgeLink>
+<BadgeLink badgeText='Read' colorScheme='yellow' href='https://web.dev/introduction-to-fetch/'>Introduction to Fetch</BadgeLink>
 <BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=-ZI0ea5O2oA'>JavaScript Fetch API</BadgeLink>