added new line in readmex

aicrowd.yaml

 ---
 challenge_name: adclk
 evaluation_repo: git@gitlab.aicrowd.com:aicrowd/practice-challenges/aicrowd_ADCLK_challenge_evaluator.git
-data_url: https://s3.wasabisys.com/aicrowd-practice-challenges/public/ADCLK/v0.1/
+data_url: https://datasets.aicrowd.com/default/aicrowd-practice-challenges/public/ADCLK/v0.1/
 official_baseline: ADCLK_baseline.ipynb
 authors:
 - name: Sanjay Pokkali