message: Remove build instructions from PR template
  and tidy up some other stuff
diff: -// Describe your changes
  +Describe your changes here.
  -Closes #:
  +Closes # (type the issue number after # if applicable; otherwise remove this line)
  +#### If development process was changed
  +Description of changes
  -#### If development process was changed:
  - Description of changes:
  - - [ ] Updated README?
  +- [ ] Updated README
  -
  -#### Merge Checklist:
  +#### Merge checklist
  - [ ] Changed base branch to release branch
  -- [ ] Updated Kit (`npm run build:docs)
  -- [ ] Enabled GH Pages for testing
  -- [ ] Tested in Chrome [(BrowserStack)](https://www.browserstack.com/)
  -- [ ] Tested in Firefox [(BrowserStack)](https://www.browserstack.com/)
  -- [ ] Tested in Safari [(BrowserStack)](https://www.browserstack.com/)
  -- [ ] Tested in Edge [(BrowserStack)](https://www.browserstack.com/)
  +- [ ] Tested in Chrome [(BrowserStack)][BrowserStack]
  +- [ ] Tested in Firefox [(BrowserStack)][BrowserStack]
  +- [ ] Tested in Safari [(BrowserStack)][BrowserStack]
  +- [ ] Tested in Edge [(BrowserStack)][BrowserStack]
  +
  +[BrowserStack]: https://www.browserstack.com/
  