Update .github/PULL_REQUEST_TEMPLATE.md
Update .github/PULL_REQUEST_TEMPLATE.md

Co-authored-by: Robin Macharg <d8c24835b2ad1e0252dbb711ad972d39c509b661@gmail.com>
bugsnag/bugsnag-cocoa,bugsnag/bugsnag-cocoa,bugsnag/bugsnag-cocoa,bugsnag/bugsnag-cocoa