Take a look at the original sentence again:
The grip of the pantyhose, the stranglehold of the scarf, and the bite of
the tight shoes made Rachel want the interview to
end, she longed for a cotton T-shirt and
jeans.
You chose to fix it the correct way:
The grip of the pantyhose, the stranglehold of the scarf, and the bite of
the tight shoes made Rachel want the interview to
end. She longed for a cotton T-shirt and
jeans.
The grip of the pantyhose, the stranglehold of the scarf, and the bite of the tight shoes made Rachel want the interview to end is a main clause. She longed for a cotton T-shirt and jeans is the second main clause. You are always correct when you use a period between the two main clauses that create the comma splice.