Invalid syntax in get_sample.py

[jstjoe]

skyflow-python/samples/get_sample.py

Line 38 in af348e9

"columnValues": "[<COLUMN_VALUE_1>,<COLUMN_VALUE_2>]",

In this sample the syntax for specifying unique values appears to be incorrect. It shows the entire array wrapped in a string, and the individual elements are (incorrectly) not handled as strings.

It should look something like this:

"columnValues": ["Buzz Aldrin"],