Update test_nhl_roster.py

[SDL101]

Fix failing NHL unit test

The file test_nhl_roster.py failed one of the tests. The error seems to be that the test expects the method player._retrieve_html_page() to return None, but instead, it's returning a list containing an HTML paragraph element ([

]). Mismatch between expected and actual outputs leads to the assertion failure.

Signed-Off-By: Scott [email protected]

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