docs: removed broken link

Signed-off-by: Yannis Folias <[email protected]>

Author: yfolias

community/catalog/compromises/2025/nx-platform.md

@@ -32,7 +32,6 @@ thousands of private repositories across the ecosystem.
 
 ## References
 
-- [Serious NX build compromise - what you need to know about the s1ngularity attack](https://www.kaspersky.com/blog/nx-build-s1ngularity-supply-chain-attack/54223)
 - [The Nx "s1ngularity" Attack: Inside the Credential Leak](https://blog.gitguardian.com/the-nx-s1ngularity-attack-inside-the-credential-leak/)
 - [s1ngularity Nx Supply Chain Attack: AI-Driven Credential Theft & Mass Exposure](https://hivepro.com/threat-advisory/s1ngularity-nx-supply-chain-attack-ai-driven-credential-theft-mass-exposure/)
 - [s1ngularity: Popular Nx Build System Package Compromised with Data-Stealing Malware](https://www.stepsecurity.io/blog/supply-chain-security-alert-popular-nx-build-system-package-compromised-with-data-stealing-malware)