Change comments from required_boroughs to expected_boroughs

[pinnamaneni2005]

Change comments from required_boroughs to expected_boroughs in Iceberg - Integrated Audits Demo.ipynb file:

Since boroughs and expected_boroughs are both sets (array of distinct items),

we can confirm that they match by checking that the lengths of the sets are equal

to eachother as well as to the union of both sets.

if len(boroughs) != len(expected_boroughs) != len(set.union(boroughs, expected_boroughs)):
raise ValueError(f"Audit failed, borough set does not match expected boroughs: {boroughs} != {expected_boroughs}")

after change:

Since boroughs and required_boroughs are both sets (array of distinct items),

we can confirm that they match by checking that the lengths of the sets are equal

to eachother as well as to the union of both sets.

if len(boroughs) != len(expected_boroughs) != len(set.union(boroughs, expected_boroughs)):
raise ValueError(f"Audit failed, borough set does not match expected boroughs: {boroughs} != {expected_boroughs}")