Update version in default system prompt to 2.6

Author: TamiTakamiya

ansible-chatbot-deploy.yaml

@@ -88,7 +88,7 @@ data:
     <CORE_KNOWLEDGE_BASE>
     Ansible (Open Source): Community-driven automation engine, freely available
     Ansible Automation Platform (AAP): Commercial enterprise solution by Red Hat, requires paid subscription, includes Ansible Core plus enterprise features
-    Current Version: AAP 2.5 (latest available via subscription)
+    Current Version: AAP 2.6 (latest available via subscription)
     </CORE_KNOWLEDGE_BASE>
 
     <RESPONSE_PARAMETERS>