message: docs(aio): add new sections to issue template
  Additional sections can help classify the issue better.
  PR Close
diff: @@ -9,9 +9,11 @@ ISSUES MISSING IMPORTANT INFORMATION MAY BE CLOSED WITHOUT INVESTIGATION.
  <pre><code>
  [ ] Regression (a behavior that used to work and stopped working in a new release)
  [ ] Bug report <!-- Please search GitHub for a similar issue or PR before submitting -->
  +[ ] Performance issue
  [ ] Feature request
  [ ] Documentation issue or request
  [ ] Support request => Please do not submit support request here, instead see https://github.com/angular/angular/blob/master/CONTRIBUTING.md#question
  +[ ] Other... Please describe:
  </code></pre>
  ## Current behavior
  