add slides Adversary Emulation July 2025

Author: Magier

_data/events.yml

@@ -577,12 +577,11 @@
   host: "Gepardec"
   event_link: "https://www.meetup.com/cloud-native-linz/events/307975704/"
   registrations: ""
-  participants: ""
+  participants: "17"
   talks:
     - title: "OpenRewrite in a Nutshell: Scaling Upgrades with Practical Insights"
       speaker: "Simon Gartner"
     - title: "Adversary Emulation for Kubernetes Environments"
       speaker: "Markus Gierlinger"
-
-
+      file: "/slides/2025-07/K8s_Adversary_Emulation.pdf"