Update Agent Companion Chat documentation

Added video demo

Author: rstrahan

docs/agent-companion-chat.md

@@ -6,9 +6,7 @@
 
 The Agent Companion Chat is an interactive AI assistant that provides a conversational experience for the GenAI IDP Accelerator. Unlike the document-specific troubleshooting tool, the companion chat offers persistent, multi-turn conversations with specialized agents that can help with analytics, code assistance, error diagnosis, and general questions about the system.
 
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-Uploading AgentChat.mp4…
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+https://github.com/user-attachments/assets/c48b9e48-e0d4-457c-8c95-8cdb7a9d332b
 
 ### Key Features