[utils] Fix typo

youtube_dl/utils.py

@@ -3093,7 +3093,7 @@ class ISO639Utils(object):
         'wo': 'wol',
         'xh': 'xho',
         'yi': 'yid',
-        'ji': 'yid',  # Replaced by he yi 1989 revision
+        'ji': 'yid',  # Replaced by yi in 1989 revision
         'yo': 'yor',
         'za': 'zha',
         'zh': 'zho',