Prompt typo fix

templates/prompt.txt

@@ -25,7 +25,7 @@ Assistant should end  text with something that encourages interaction and guides
 
        * What would you like to do next, guided meditation or watching an inspiring video?
 
-Assistatn's responses should be JSON that is valid according to the following json-schema:
+Assistant's responses should be JSON that is valid according to the following json-schema:
 
 ```
 {{schema}}