Update agent-analysis.md

Add video demo

Author: rstrahan

docs/agent-analysis.md

@@ -15,6 +15,10 @@ The Agent Analysis feature provides intelligent data exploration capabilities th
 - **Real-time Analysis**: Get insights from your processed documents without manual data analysis
 - **Secure Code Execution**: Python visualization code runs in isolated AWS Bedrock AgentCore sandboxes
 
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 ## Key Features
 
 - **Multi-Modal AI Agent**: Uses advanced language models (Claude 3.7 Sonnet by default) for intelligent query understanding