DROP TABLES at the end of tutorial 1 are not commented out

[rngadam]

Run All executes these DROP:

https://github.com/postgresml/postgresml/blob/d3f560cff2a96d148cc798bc575d54d7ef9d013a/pgml-dashboard/migrations/20221129170843_notebooks_data.up.sql#L558

the text above implies these would be initially commented out?

expected:

[montanalow]

We'll need a migration to update this