test: use playlist item instead of entry

tests/test_scheduling_api_fetcher.py

@@ -244,7 +244,7 @@ class TestSchedulingApiFetcher(unittest.TestCase):
         self.assertEqual(pl_items[0], pl.items[1].prev)
         self.assertIsNone(pl_items[1].next)
 
-        # Playlist Entry 1
+        # Playlist Item 1
         self.assertEqual(100, pl_items[0].volume)
         self.assertEqual("file://musikprogramm/303", pl_items[0].source)
         self.assertEqual(199040000000, pl_items[0].duration)
@@ -252,7 +252,7 @@ class TestSchedulingApiFetcher(unittest.TestCase):
         self.assertEqual("The Teaches of Peaches", pl_items[0].metadata.album)
         self.assertEqual("AA XXX", pl_items[0].metadata.title)
 
-        # Playlist Entry 2
+        # Playlist Item 2
         self.assertEqual(100, pl_items[1].volume)
         self.assertEqual("file://musikprogramm/808", pl_items[1].source)
         self.assertEqual(299040000000, pl_items[1].duration)