message: Update ISSUE_TEMPLATE.md
  Fixes 16350
diff: @@ -4,7 +4,7 @@ https://stackoverflow.com/questions/tagged/tensorflow
  If you open a GitHub issue, here is our policy:
  -1. It must be a bug or a feature request.
  +1. It must be a bug, a feature request, or a significant problem with documentation (for small docs fixes please send a PR instead).
  2. The form below must be filled out.
  3. It shouldn't be a TensorBoard issue. Those go [here](https://github.com/tensorflow/tensorboard/issues).
  