Fix README images

Author: strickvl

deep_research/README.md

@@ -25,7 +25,7 @@ This project transforms exploratory notebook-based research into a production-gr
 The Deep Research Agent produces comprehensive, well-structured reports on any topic. Here's an example of research conducted on quantum computing:
 
 <div align="center">
-  <img alt="Sample Research Report" src="assets/sample_report.png" width="70%">
+  <img alt="Sample Research Report" src="assets/sample_report.gif" width="70%">
   <p><em>Sample report generated by the Deep Research Agent</em></p>
 </div>