Fix string interpolation in dubbing task completion message

- Corrected print statement to use single quotes for `run_id` interpolation

cambai/__init__.py

@@ -797,7 +797,7 @@ def dub(
  if task["run_id"] is None:
  raise APIError("Run ID is None")
 
- print(f"Dubbing Task {task["run_id"]} Completed!")
+ print(f"Dubbing Task {task['run_id']} Completed!")
 
  # Return the dubbed run information
  return self.get_dubbed_run_info(task["run_id"])