Workshop uses deprecated `dkist` functions

[braingram]

dkist.Dataset.from_asdf:
https://github.com/search?q=repo%3ADKISTDC%2FNSO-Python-Workshop%20from_asdf&type=code
dkist.Dataset.from_directory:
https://github.com/search?q=repo%3ADKISTDC%2FNSO-Python-Workshop%20from_directory&type=code

I'm not sure if this is all of the deprecated usage. It's just what I noticed while looking over the very helpful workshop.