test(tests): replace "stub" with "fake" in conftest docstring (#559)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nanotaboada

tests/conftest.py

@@ -31,7 +31,7 @@ def nonexistent_player_in_db(client: Any) -> Generator[Player, None, None]:
     Creates the nonexistent player in the database and removes it on teardown.
 
     Yields:
-        Player: The player stub created in the database.
+        Player: The fake player created in the database.
     """
     player: Player = nonexistent_player()
     client.post("/players/", json=player.__dict__)