Update pull_request_template.md (#413)

Add clarifications for two of the fields in the template.

---------

Signed-off-by: Hui Wu <37307711+spacew@users.noreply.github.com>

.github/pull_request_template.md

@@ -21,18 +21,23 @@ following questionnaire with whatever information is applicable to your PR.
 ```
 
 
-**Response that was received**
+**Response from the original model**
 
-<!-- What you received in response to your input, replace "..." -->
+
+<!-- What you received from the original model in response to your input, 
+replace "..." -->
 
 ```
   ...
 ```
 
 
-**Response that is now received instead**
+**Response from the fine-tuned model**
+
 
-<!-- What you receive with your contribution, replace "..." -->
+<!-- Generate a synthetic dataset based on your newly added seed data; train the model 
+with the synthetic data and now re-test the model's response with the same prompt.
+Replace "..." with what you receive with the finetuned model. -->
 
 ```
   ...