Fix system prompts (#33)

Something changed with the model internally where it will sometimes
output mark down formattings we want to explicitly tell it not to do
that unless we request for that

GPT/lib/talon_settings.py

@@ -29,6 +29,6 @@
 mod.setting(
     "model_system_prompt",
     type=str,
-    default="You are an assistant helping an office worker to be more productive. Output just the response to the request and no additional content.",
+    default="You are an assistant helping an office worker to be more productive. Output just the response to the request and no additional content. Do not generate any markdown formatting unless it is requested.",
     desc="The default system prompt that informs the way the model should behave at a high level",
 )