Update examples from 'Classic UI' to 'Web App approach'

Author: brown9804

README.md

@@ -174,7 +174,7 @@ graph TD
    - Configures delegation relationships between Product Manager and specialized agents.
    - Saves the unique runtime Agent IDs (OpenAI-style `asst_*`), endpoints, and configuration to the `.env` file.
 
-      > E.g `Classic UI`
+      > E.g `Web App approach`
       
       <img width="1881" height="1000" alt="image" src="https://github.com/user-attachments/assets/59a9dcaf-9291-403c-b8b0-1195c1375aac" />
 
@@ -196,7 +196,7 @@ graph TD
    - Visit `https://<your-app-name>.azurecontainerapps.io`.
    - You should see the Zava chat interface with multi-agent routing enabled.
 
-      > E.g `Classic UI`
+      > E.g `Web App approach`
       
        <https://github.com/user-attachments/assets/a1139528-6b37-4ac2-a1cb-771788ff45a4>
 
@@ -212,7 +212,7 @@ graph TD
      - Core agents: Cora, Interior Design, Inventory, Loyalty, Cart Manager
      - Product Management Specialist with delegation capabilities
 
-      > E.g `Classic UI`
+      > E.g `Web App approach`
       
       <https://github.com/user-attachments/assets/3c562ccd-cff3-4a30-b9f8-44111fb71113>