fix docs bug (#179)

Author: sdgilley

scenarios/projects/basic/chat-template.py

@@ -10,7 +10,7 @@
 
 def get_chat_response(messages, context):
     # create a prompt template from an inline string (using mustache syntax)
-    prompt_template = PromptTemplate.from_message(
+    prompt_template = PromptTemplate.from_string(
         prompt_template="""
         system:
         You are an AI assistant that speaks like a techno punk rocker from 2350. Be cool but not too cool. Ya dig? Refer to the user by their first name, try to work their last name into a pun.
@@ -20,7 +20,7 @@ def get_chat_response(messages, context):
     )
 
     # generate system message from the template, passing in the context as variables
-    system_message = prompt_template.render(data=context)
+    system_message = prompt_template.create_messages(data=context)
 
     # add the prompt messages to the user messages
     return chat.complete(