Update leaderboard with sentiment task

src/about.py

@@ -13,6 +13,7 @@ class Task:
 class Tasks(Enum):
     # task_key in the json file, metric_key in the json file, name to display in the leaderboard 
     task0 = Task("custom|heq-qa-tlnls|0", "heq_tlnls", "QA TLNLS (HeQ)")
+    task0 = Task("custom|sentiment-acc|0", "sentiment_acc", "Sentiment Acc (Mafat)")
     
 NUM_FEWSHOT = 0 # Change with your few shot
 # ---------------------------------------------------