chg: [NIS2] information added about the article 29

Author: adulau

content/nis2-directive.md

@@ -67,6 +67,7 @@ Entities must **take** appropriate and proportionate technical, operational, and
 | Article 11   | CSIRT operational tasks                      | Alerting, proactive detection, enrichment, and national-level coordination|
 | Article 12   | Coordinated vulnerability disclosure         | API submissions, GCVE support, metadata tagging, and reviewer workflow  |
 | Article 21   | Cybersecurity risk-management measures | Risk tracking, auditability and vulnerability information                |
+| Article 29   | Cybersecurity information-sharing arrangements | Federated sharing capabilities, collaborative features, [MISP integration](https://www.misp-project.org/) |
 
 
 ## Conclusion