Update PULL_REQUEST_TEMPLATE.md

Author: korenyoni

.github/PULL_REQUEST_TEMPLATE.md

@@ -3,3 +3,11 @@
 ## Why
 
 ## Notes
+<!-- Add any notes here -->
+
+## PR Checklist
+
+* [ ] _I have [allowed changes to my fork to be made](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork)._
+* [ ] _I have added tests, assuming new tests are warranted_.
+* [ ] _I have updated the Terraform docs in this repo, assuming any changes to the schema of Resources or Data Sources have been made._
+* [ ] _I understand that the `/test` comment will be ignored by the CI trigger [unless it is made by a repo admin or collaborator](https://codefresh.io/docs/docs/pipelines/triggers/git-triggers/#support-for-building-pull-requests-from-forks)._