Update Feature_request.md

Author: RyanCavanaugh

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -31,8 +31,9 @@ What shortcomings exist with current approaches?
 
 ## Checklist
 
-I attest that all of the following are true:
- [ ] This wouldn't change the behavior of existing JavaScript code
- [ ] This could be implemented without emitting different JS based on the types of the expressions
- [ ] This isn't a runtime feature that should be handled by TC39 instead
+My suggestion meets these guidelines:
  [ ] This wouldn't be a breaking change in existing TypeScript / JavaScript code
+ [ ] This wouldn't change the runtime behavior of existing JavaScript code
+ [ ] This could be implemented without emitting different JS based on the types of the expressions
+ [ ] This isn't a runtime feature (e.g. new expression-level syntax)
+