Update PULL_REQUEST_TEMPLATE.md

Author: jaredcnance

PULL_REQUEST_TEMPLATE.md

@@ -1,3 +1,5 @@
+
+
 Closes #{ISSUE_NUMBER}
 
 #### BUG FIX
@@ -9,3 +11,7 @@ Closes #{ISSUE_NUMBER}
 - [ ] write tests that address the requirements outlined in the issue
 - [ ] fulfill the feature requirements
 - [ ] bump package version
+
+#### RELATED REPOSITORY UPDATES
+- does this feature require documentation? if so, open an issue in the [docs repo](https://github.com/json-api-dotnet/json-api-dotnet.github.io/issues/new)
+- does this feature break an API that is implemented in the templates repository? if so, [open an issue](https://github.com/json-api-dotnet/Templates/issues/new)