message: fix command in the README
diff: @@ -129,7 +129,7 @@ pip install -e .
  4. Prepare the data:
  ```
  -split-data --data-directory data --number-of-participants 10 --coordinator_url http://localhost:8081
  +split-data --data-directory data --number-of-participants 10
  ```
  5. Run one participant:
  