message: PR template improvements
diff: -<!-- Before you submit your Pull Request, make sure you picked the right branch:
  -
  +<!--
  + Before you submit your Pull Request, make sure you picked the right branch:
  - For hotfixes, select "master" as the target branch
  - For new features and non-hotfix bugfixes, select "develop" as the target branch
  - - For release feature fixes, select the relevant release branch (release/X.Y.Z) as the target branch -->
  + - For release feature fixes, select the relevant release branch (release/X.Y.Z) as the target branch
  -## Purpose
  + Ticketd PRs should be prefixed with the ticket id, e.g. `[EMB-123] some really great stuff`
  +-->
  +## Purpose
  +<!-- Describe the purpose of your changes. -->
  ## Summary of Changes
  +<!-- Briefly describe or list your changes. -->
  +## Side Effects
  -## Side Effects / Testing Notes
  +<!-- Any possible side effects? (https://en.wikipedia.org/wiki/Side_effect_%28computer_science%29) -->
  +## Feature Flags
  +<!--
  + Please list any feature flags that need to be enabled for these changes to go into effect.
  + For each flag, what is the expected behavior with the flag enabled vs disabled?
  +-->
  +
  +## QA Notes
  +
  +<!--
  + Does this change need QA? If so, this section is required.
  + - What pages should be tested?
  + - Is cross-browser testing required/recommended?
  + - What edge cases should QA be aware of?
  + - What level of risk would you expect these changes to have?
  +-->
  ## Ticket
  +<!-- Link to JIRA ticket. Please indicate unticketed PRs with: `N/A` -->
  https://openscience.atlassian.net/browse/EMB-
  # Reviewer Checklist
  