message: docs: improve pr template
  Make instructional comments html comments so they are hidden, and change the mention of application-security to the full handle that should be used.
diff: @@ -25,9 +25,17 @@ This PR creates, modifies, or deletes:
  - [ ] Cryptography: Encryption, hashing, certificates, signatures, random numbers, etc.
  - [ ] User data: personal information handling, logs, error messages, etc.
  -If you checked any of those, please request a review from `@application-security`.
  +<!--
  +
  +If you checked any of those, please request a review from `@reach4help/application-security`.
  +
  +-->
  Additional Notes
  ----------------
  +<!--
  +
  If this PR fixes an issue, please add "closes #issue-id" here, otherwise add a reference to the issue it relates to.
  +
  +-->
  