Add raicode PR to checklist (#82)

Author: nickrobinson251

.github/pull_request_template.md

@@ -11,3 +11,4 @@ _What does this PR do?_
 Requirements for merging:
 - [ ] I have opened an issue or PR upstream on JuliaLang/julia: <link to JuliaLang/julia>
 - [ ] I have removed the `port-to-*` labels that don't apply.
+- [ ] I have opened a PR on raicode to test these changes: <link to raicode>