Rename llm variable to model

Author: neilmehta24

README.md

@@ -26,8 +26,8 @@ loaded LLM is as straightforward as:
 ```python
 import lmstudio as lms
 
-llm = lms.llm()
-llm.complete("Once upon a time,")
+model = lms.llm()
+model.complete("Once upon a time,")
 ```
 
 Requesting a chat response instead only requires the extra step of
@@ -42,12 +42,12 @@ EXAMPLE_MESSAGES = (
     "I will not buy this record, it is scratched."
 )
 
-llm = lms.llm()
+model = lms.llm()
 chat = lms.Chat("You are a helpful shopkeeper assisting a foreign traveller")
 for message in EXAMPLE_MESSAGES:
     chat.add_user_message(message)
     print(f"Customer: {message}")
-    response = llm.respond(chat)
+    response = model.respond(chat)
     chat.add_assistant_response(response)
     print(f"Shopkeeper: {response}")
 ```