Fix Prefill docs (#33352)

last -> final

docs/source/en/chat_templating.md

@@ -196,7 +196,7 @@ Not all models require generation prompts. Some models, like LLaMA, don't have a
 special tokens before bot responses. In these cases, the `add_generation_prompt` argument will have no effect. The exact
 effect that `add_generation_prompt` has will depend on the template being used.
 
-## What does "continue_last_message" do?
+## What does "continue_final_message" do?
 
 When passing a list of messages to `apply_chat_template` or `TextGenerationPipeline`, you can choose
 to format the chat so the model will continue the final message in the chat instead of starting a new one. This is done
@@ -211,15 +211,15 @@ chat = [
     {"role": "assistant", "content": '{"name": "'},
 ]
 
-formatted_chat = tokenizer.apply_chat_template(chat, tokenize=True, return_dict=True, continue_last_message=True)
+formatted_chat = tokenizer.apply_chat_template(chat, tokenize=True, return_dict=True, continue_final_message=True)
 model.generate(**formatted_chat)
 ```
 
 The model will generate text that continues the JSON string, rather than starting a new message. This approach
 can be very useful for improving the accuracy of the model's instruction-following when you know how you want
 it to start its replies.
 
-Because `add_generation_prompt` adds the tokens that start a new message, and `continue_last_message` removes any
+Because `add_generation_prompt` adds the tokens that start a new message, and `continue_final_message` removes any
 end-of-message tokens from the final message, it does not make sense to use them together. As a result, you'll
 get an error if you try!
 
@@ -228,7 +228,7 @@ get an error if you try!
 The default behaviour of `TextGenerationPipeline` is to set `add_generation_prompt=True` so that it starts a new
 message. However, if the final message in the input chat has the "assistant" role, it will assume that this message is 
 a prefill and switch to `continue_final_message=True` instead, because most models do not support multiple 
-consecutive assistant messages. You can override this behaviour by explicitly passing the `continue_last_message` 
+consecutive assistant messages. You can override this behaviour by explicitly passing the `continue_final_message` 
 argument when calling the pipeline.
 
 </Tip>