Update pull request template to include type annotations as part of c…

…hecklist (#8687)

* Update pull request template to include type annotations as part of checklist

* Add to checklist item a link to python typing information

.github/pull_request_template.md

@@ -30,3 +30,4 @@ resolves #
 - [ ] I have run this code in development and it appears to resolve the stated issue  
 - [ ] This PR includes tests, or tests are not required/relevant for this PR
 - [ ] This PR has no interface changes (e.g. macros, cli, logs, json artifacts, config files, adapter interface, etc) or this PR has already received feedback and approval from Product or DX
+- [ ] This PR includes [type annotations](https://docs.python.org/3/library/typing.html) for new and modified functions