Update app.py

app.py

@@ -26,6 +26,7 @@ def get_material_info(user_input):
     - A simplified representation of its atomic structure (if readily available and can be described textually, e.g., "FCC lattice", "HCP lattice", or a simple chemical formula with a basic structural description).
 
     Format your response as a JSON object with the following structure:
+    ```json
     {
       "materials": [
         {
@@ -60,6 +61,7 @@ def get_material_info(user_input):
         }
       ]
     }
+    ```
     """
     body = {
         "model": "llama-3.1-8b-instant",