Fix wrong notebook link in Lab 5.1 - change from 60-deployment to 51-trace-cora-retail-agent

Co-authored-by: BethanyJep <44121227+BethanyJep@users.noreply.github.com>

Author: Copilot

docs/core-labs/5-tracing/51-trace-cora-retail-agent.md

@@ -16,7 +16,7 @@ Now that Cora is handling customer queries, the team needs production-grade obse
 
 !!! lab "NOTEBOOK: Tracing Cora Reatil Agent"
 
-    **📓 Open:** [`labs/6-deployment/60-deployment.ipynb`](https://github.com/microsoft/ignite25-PDY123-learn-how-to-observe-manage-and-scale-agentic-ai-apps-using-azure/blob/main/labs/5-tracing/51-trace-cora-retail-agent.ipynb)
+    **📓 Open:** [`labs/5-tracing/51-trace-cora-retail-agent.ipynb`](https://github.com/microsoft/ignite25-PDY123-learn-how-to-observe-manage-and-scale-agentic-ai-apps-using-azure/blob/main/labs/5-tracing/51-trace-cora-retail-agent.ipynb)
 
     **🚀 Run the notebook:**