fix for leaderboard

I've talked today with Sanchit and original values were right. You need to be found on leaderboard after selecting config {language code]. Not on default leaderboard.

README.md

@@ -19,7 +19,8 @@ model-index:
     dataset:
       name: mozilla-foundation/common_voice_11_0
       type: mozilla-foundation/common_voice_11_0
-      args: 'config: ml, split: test'
+      config: ml
+      split: test
     metrics:
     - name: Wer
       type: wer