Update README.md

README.md

@@ -57,6 +57,7 @@ Here `va_normalized_name` is the most name most often appeared in the credit of
 - For char or voice actors not in vndb database, its `vndb_char_id` and `vndb_staff_id` is empty
   - For e.g. speaker verification, you may remove rows with `vndb_staff_id` empty, or manually add unique id to such rows
 - Some multiple `charname` corresponds to the same charactor (e.g. it occurs when the same charactor is called in many ways).
+- Since the `va_normalized_name` is automatically obtained, when the same romaji corresponds to multiple Japanese name (e.g. `一色ヒカル` and `一色光`), it may not be the most common names (in this case, `一色ヒカル` is more common, but currently its normalized form is `一色光`)
 - Currently I'm manually updating [`voice_actor_info.tsv`](voice_actor_info.tsv), so may be updated
 
 ## Some notes on the dataset which you may find useful