Update CORS Resources (#3908)

* Update 106-cors.md

* Update 102-cors.md

* Update 106-cors.md

src/data/roadmaps/backend/content/111-web-security-knowledge/106-cors.md

@@ -1,8 +1,10 @@
 # Cors
 
 Cross-Origin Resource Sharing (CORS) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own from which a browser should permit loading resources.
+
 Visit the following resources to learn more:
 
 - [Cross-Origin Resource Sharing (CORS)](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS)
 - [CORS in 100 Seconds](https://www.youtube.com/watch?v=4KHiSt0oLJ0)
 - [CORS in 6 minutes](https://www.youtube.com/watch?v=PNtFSVU-YTI)
+- [Understanding CORS](https://rbika.com/blog/understanding-cors)

src/data/roadmaps/frontend/content/106-web-security-knowledge/102-cors.md

@@ -4,4 +4,7 @@ Cross-Origin Resource Sharing (CORS) is an HTTP-header based mechanism that allo
 
 Visit the following resources to learn more:
 
-- [CORS — Cross-Origin Resource Sharing](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS)
+- [Cross-Origin Resource Sharing (CORS)](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS)
+- [CORS in 100 Seconds](https://www.youtube.com/watch?v=4KHiSt0oLJ0)
+- [CORS in 6 minutes](https://www.youtube.com/watch?v=PNtFSVU-YTI)
+- [Understanding CORS](https://rbika.com/blog/understanding-cors)