Update events.yml

Author: jetzlstorfer

_data/events.yml

@@ -586,5 +586,5 @@
     - title: "Adversary Emulation for Kubernetes Environments"
       speaker: "Markus Gierlinger"
       file: "/slides/2025-07/K8s_Adversary_Emulation.pdf"
-      recording: "https://youtu.be/Bs9ndXt7DZY"
+      recording: "https://www.youtube.com/watch?v=Bs9ndXt7DZY"