Update bug_report.yml (#1811)

## What
This modification asks the user to explicitly mention the model used in their experiments. 


## Why
Frequently, many issues can be better understood by reviewing the model used. For example, small models have limitations in their ability to generate code in code blocks or follow complex instructions leading to errors.

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -22,6 +22,12 @@ body:
         3. ...
         4. See error
       placeholder: How can we replicate the issue?
+  - type: textarea
+    id: modelused
+    attributes:
+      label: Model Used
+      description: A description of the model that was used when the error was encountered
+      placeholder: gpt-4, mistral-7B etc
   - type: textarea
     id: expected_behavior
     attributes: