Make the PR template hierarchy a bit clearer (codesandbox#2021)

Author: MichaelDeBoey

.github/PULL_REQUEST_TEMPLATE.md

@@ -6,26 +6,25 @@ Please fill out the information below to expedite the review and (hopefully)
 merge of your pull request!
 -->
 
+## What kind of change does this PR introduce?
+
 <!-- Is it a Bug fix, feature, docs update, ... -->
 
-**What kind of change does this PR introduce?**
+## What is the current behavior?
 
 <!-- You can also link to an open issue here -->
 
-**What is the current behavior?**
+## What is the new behavior?
 
 <!-- if this is a feature change -->
 
-**What is the new behavior?**
-
-<!-- Have you done all of these things?  -->
-
-**What steps did you take to test this?**
+## What steps did you take to test this?
 
 <!-- Most important part!  -->
 
-**Checklist**:
+## Checklist
 
+<!-- Have you done all of these things?  -->
 <!-- add "N/A" to the end of each line that's irrelevant to your changes -->
 <!-- to check an item, place an "x" in the box like so: "- [x] Documentation" -->
 
@@ -35,5 +34,4 @@ merge of your pull request!
 - [ ] Added myself to contributors table <!-- this is optional, see the contributing guidelines for instructions -->
 
 <!-- feel free to add additional comments -->
-
 <!-- Thank you for contributing! -->