message: Make the PR template less unfriendly
  Dunno how to feel about this. I want to guide people, but i don't want HTML comments in my `git log`
diff: -<!-- Enter a brief description/summary of your PR here. What does it fix/what does it change/how was it tested (even manually, if necessary)? -->
  ## Summary of the Pull Request
  -<!-- Other than the issue solved, is this relevant to any other issues/existing PRs? -->
  -## References
  +## References and Relevant Issues
  -<!-- Please review the items on the PR checklist before submitting-->
  -## PR Checklist
  -* [ ] Closes #xxx
  -* [ ] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
  -* [ ] Tests added/passed
  -* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
  -* [ ] Schema updated.
  -* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
  -
  -<!-- Provide a more detailed description of the PR, other things fixed or any additional comments/features here -->
  ## Detailed Description of the Pull Request / Additional comments
  -<!-- Describe how you validated the behavior. Add automated tests wherever possible, but list manual validation steps taken as well -->
  ## Validation Steps Performed
  +
  +## PR Checklist
  +- [ ] Closes #xxx
  +- [ ] Tests added/passed
  +- [ ] Documentation updated
  + - If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
  +- [ ] Schema updated (if necessary)
  