text: Title: Docstring of Datalab.find_issues issue_types docstring should link to the guide
  Body: The docstring here: https://docs.cleanlab.ai/master/cleanlab/datalab/datalab.html#cleanlab.datalab.datalab.Datalab.find_issues
  
  for the `issue_types` argument should link to the Issue Types guide: https://docs.cleanlab.ai/stable/cleanlab/datalab/guide/index.html
  
  (in the proper internal linking format). 
  
  So that users know what are possible values for this arg.