update wording of warning log

Author: johnnygreco

src/data_designer/engine/dataset_builders/utils/dataset_batch_manager.py

@@ -100,8 +100,9 @@ def finish_batch(self, on_complete: Callable[[Path], None] | None = None) -> Pat
             final_file_path = None
 
             logger.warning(
-                f"⚠️ Batch {self._current_batch_number + 1} finished without any results to write. Data from this batch "
-                f"have been written to the partial results directory: {self.artifact_storage.partial_results_path}"
+                f"⚠️ Batch {self._current_batch_number + 1} finished without any results to write. "
+                "A partial dataset containing the currently available columns has been written to the partial results "
+                f"directory: {self.artifact_storage.partial_results_path}"
             )
 
         self._current_batch_number += 1