Update pull request template to add integration tests with github/github checklist item (#3844)

* Update pull request template to add integration tests with github/github checklist item

* update link text

* Update .github/pull_request_template.md

* update the text and move it to merge checklist

Author: broccolinisoup

.github/pull_request_template.md

@@ -42,5 +42,6 @@ Closes #
 - [ ] Tested in Firefox
 - [ ] Tested in Safari
 - [ ] Tested in Edge
+- [ ] Integration tests pass at github/github ([Learn more about how to run integration tests](https://github.com/github/primer-engineering/blob/main/how-we-work/testing-primer-react-pr-at-dotcom.md))
 
 Take a look at the [What we look for in reviews](https://github.com/primer/react/blob/main/contributor-docs/CONTRIBUTING.md#what-we-look-for-in-reviews) section of the contributing guidelines for more information on how we review PRs.