Add license information

README.md

@@ -22,3 +22,7 @@ The data format for each line in the `train_code_v3.jsonl` is as follows:
 Some entries have truncated docstrings due to maximum length constraints during preprocessing.
 
 *Note: We filtered samples based on code quality metrics. Future versions may include additional quality annotations.
+
+**License**
+
+The license for this dataset is MIT.