fix(cyber-security): replace 12 dead resource links

[aquibn]

Fixes the dead links reported in #10249 for the Cyber Security roadmap.

What I found

I re-checked all 628 distinct URLs in roadmaps/cyber-security/content and followed every redirect to its final status. One correction to the report in #10249: most of the TechTarget links are listed there under 3xx, but the 301 is only the first hop — TechTarget reorganised its sections and the redirect targets themselves 404:

https://www.techtarget.com/searchsecurity/definition/phishing
  301 -> https://www.techtarget.com/cybersecurity/definition/phishing
  404

So these are not links that merely need their redirect resolved; the content is gone and they need genuine replacements. watering-hole-attack is dead the same way and was not in the original report.

12 links are confirmed 404 by two independent HTTP clients (requests and curl):

Topic	Dead link	Replacement
radius	techtarget /definition/RADIUS	@official@ RFC 2865
rmf	techtarget /definition/Risk-Management-Framework-RMF	@official@ NIST CSRC — About the RMF
guestos	techtarget /definition/guest-OS-guest-operating-system	NIST CSRC Glossary
salting	techtarget /definition/salt	OWASP Password Storage Cheat Sheet + Salt (cryptography)
phishing	techtarget /definition/phishing	CISA — Recognize and Report Phishing
antimalware	riskxchange.co	CISA — Understanding Anti-Virus Software
common-protocols-and-their-uses	techtarget /12-common-network-protocols...	CompTIA — What Is a Network Protocol?
iso	techtarget /definition/ISO	ISO/IEC 27001
cism	techtarget /definition/certified-information-security-manager-CISM	CISM
eap-vs-peap	techtarget /definition/PEAP...	PEAP
evil-twin	techtarget /definition/evil-twin	Evil twin (wireless networks)
watering-hole-attack	techtarget /definition/watering-hole-attack	Watering hole attack

Notes on the approach

• Replaced rather than removed. salting had this as its only resource and would have been left with none, which is the concern raised in [Cyber Security] Broken Links #10249 — it gets two replacements.
• Preferred primary sources. Where a standards body or the protocol's own specification covers the topic, I used that (IETF RFC 2865, NIST CSRC, OWASP, CISA) rather than another aggregator that can reorganise the same way TechTarget just did.
• Resource-type ordering preserved (@official@ → @article@ → @video@) in every file; radius and rmf gain an @official@ link that correctly sorts first.
• No topic exceeds the 8-link maximum and no GeeksforGeeks links were added.

Verification

Every one of the 27 URLs across the 12 changed files was re-checked after the edit. All 12 replacements return 200. The remaining non-200s are pre-existing links I did not touch and are bot-protection responses, not dead pages (YouTube 429 from my own rate-limited scanning, iso.org and nordvpn.com 403).

I also excluded 43 links that return 403 to automated checks — Cloudflare, Cisco, NordVPN and similar serve those to non-browser clients while the pages load fine for real users, so treating them as broken would be a false positive.

Thanks to @gdaffa for the original report.

[gdaffa]

I think its ISO in general, not just ISO/IEC 27001, because if you look at this topic description, it doesn't talk about any specific ISO, just the definition of ISO.

[gdaffa]

Its antimalware, not antivirus. Antivirus discussed in separate topic in this roadmap.

Also I believe this topic should be dropped, as antivirus and antimalware almost have the same definition, and antivirus now days usually has the same feature as antimalware.

[gdaffa]

Suggested change

	- [@official@RFC 2865 - Remote Authentication Dial In User Service (RADIUS)](https://datatracker.ietf.org/doc/html/rfc2865)
	- [@official@Remote Authentication Dial In User Service (RADIUS) - RFC 2865](https://datatracker.ietf.org/doc/html/rfc2865)

Just suggesting to move the RFC to the right, as RADIUS is the main topic that talked about.

[gdaffa]

https://en.wikipedia.org/wiki/Certified_Information_Security_Manager redirects to https://en.wikipedia.org/wiki/ISACA, which mostly talk about ISACA, not CISM.