Improves pull request template so it's followed (#465)

Co-authored-by: Kevin Martens <99040580+kmartens27@users.noreply.github.com>

.github/pull_request_template.md

@@ -1,3 +1,14 @@
+<!--
+ DO NOT DELETE
+ 
+ This template was created to help contributors validate their contribution
+ and help maintainers understand the contribution.
+ Do not delete the template, but complete it. Check the tasklist items that
+ the contribution validates, add your contribution description and what kind
+ of testing you have done on it.
+ The template was not created to be ignored.
+ -->
+
 ### Description
 
 Closes #issue-id.