[threat actors] Update README

Author: Mathieu4141

README.md

@@ -712,7 +712,7 @@ Category: *tea-matrix* - source: ** - total: *7* elements
 
 [Threat Actor](https://www.misp-galaxy.org/threat-actor) - Known or estimated adversary groups targeting organizations and employees. Adversary groups are regularly confused with their initial operation or campaign. threat-actor-classification meta can be used to clarify the understanding of the threat-actor if also considered as operation, campaign or activity group.
 
-Category: *actor* - source: *MISP Project* - total: *943* elements
+Category: *actor* - source: *MISP Project* - total: *953* elements
 
 [[HTML](https://www.misp-galaxy.org/threat-actor)] - [[JSON](https://github.com/MISP/misp-galaxy/blob/main/clusters/threat-actor.json)]