chore: update PR template to list codegen parameters changed (#758)

* chore: update PR template to list codegen parameters changed

* chore: fix typo

* Update PULL_REQUEST_TEMPLATE.md

Co-authored-by: Tim Schmelter <[email protected]>

---------

Co-authored-by: Tim Schmelter <[email protected]>

Author: Dane Pilcher

.github/PULL_REQUEST_TEMPLATE.md

@@ -10,6 +10,10 @@ Thank you for your Pull Request! Please provide a description above and review
 the requirements below.
 -->
 
+#### Codegen Paramaters Changed or Added
+<!--
+List any codegen parameters changed or added.
+-->
 
 #### Issue #, if available
 <!-- Also, please reference any associated PRs for documentation updates. -->