Reminder to update docs when making changes (microsoft#1341)

Co-authored-by: Jamie D <[email protected]>
Co-authored-by: Tamir Kamara <[email protected]>

.github/pull_request_template.md

@@ -2,9 +2,10 @@
 
 ## What is being addressed
 
-Describe the current behavior you are modifying
+Describe the current behavior you are modifying.  Please also remember to update any impacted documentation.
 
 ## How is this addressed
 
 - Describe the changes made, and if appropriate, why they are addressed this way
 - Note any pending work (with links to the issues that will address them)
+- Update documentation