message: Update PULL_REQUEST_TEMPLATE.md
  Add a section about documentation
diff: @@ -16,3 +16,7 @@ _Describe the changes if appropriate. E.g. a new link, a change on what a click
  ** Screenshot **
  Add a screenshot of the UI after your changes.
  +
  +** Documentation **
  +
  +Please provide an update to documentation if appropriate. For configuration options, consider sending a PR to https://github.com/kiali/kiali/blob/master/README.adoc
  