Update dns.md (#6223)

* Update dns.md - Fix the YouTube video link error and update the video title.

* Update understand-cia-triad.md

src/data/roadmaps/cyber-security/content/dns@ORIdKG8H97VkBUYpiDtXf.md

@@ -23,5 +23,5 @@ Some common DNS record types you might encounter include:
 As an essential part of the internet, the security and integrity of the DNS infrastructure are crucial. However, it's vulnerable to various types of cyber attacks, such as DNS cache poisoning, Distributed Denial of Service (DDoS) attacks, and DNS hijacking. Proper DNS security measures, such as DNSSEC (DNS Security Extensions) and monitoring unusual DNS traffic patterns, can help mitigate risks associated with these attacks.
 
 - [@article@DNS in detail (TryHackMe)](https://tryhackme.com/room/dnsindetail)
-- [@video@DNS in 100 Seconds (YouTube)](https://www.youtube.com/watch?v=uvr9lhugayu)
+- [@video@DNS Explained in 100 Seconds (YouTube)](https://www.youtube.com/watch?v=UVR9lhUGAyU)
 - [@feed@Explore top posts about DNS](https://app.daily.dev/tags/dns?ref=roadmapsh)

src/data/roadmaps/cyber-security/content/dns@r1IKvhpwg2umazLGlQZL1.md

@@ -23,5 +23,5 @@ Some common DNS record types you might encounter include:
 As an essential part of the internet, the security and integrity of the DNS infrastructure are crucial. However, it's vulnerable to various types of cyber attacks, such as DNS cache poisoning, Distributed Denial of Service (DDoS) attacks, and DNS hijacking. Proper DNS security measures, such as DNSSEC (DNS Security Extensions) and monitoring unusual DNS traffic patterns, can help mitigate risks associated with these attacks.
 
 - [@article@DNS in detail (TryHackMe)](https://tryhackme.com/room/dnsindetail)
-- [@video@DNS in 100 Seconds (YouTube)](https://www.youtube.com/watch?v=uvr9lhugayu)
+- [@video@DNS Explained in 100 Seconds (YouTube)](https://www.youtube.com/watch?v=UVR9lhUGAyU)
 - [@feed@Explore top posts about DNS](https://app.daily.dev/tags/dns?ref=roadmapsh)

src/data/roadmaps/cyber-security/content/understand-cia-triad@uz6ELaLEu9U4fHVfnQiOa.md

@@ -34,4 +34,4 @@ Availability ensures that systems and information are accessible and functional
 
 In summary, the CIA Triad is an essential aspect of cybersecurity, providing a clear framework to evaluate and implement security measures. By ensuring confidentiality, integrity, and availability, you create a robust and secure environment for your information and systems.
 
-- [@article@What is the CIA Triad (Varonis)?](https://www.varonis.com/blog/cia-triad)
+- [@video@The CIA Triad - Professor Messer](https://www.youtube.com/watch?v=SBcDGb9l6yo)