Add license information

README.md

@@ -21,4 +21,8 @@ The data format for each line in the `code_samples_filtered.jsonl` is as follows
 
 This dataset contains filtered Python code samples extracted from the codeparrot/github-code-clean dataset, a filtered collection of permissively licensed code from GitHub.
 
-*Note: Some samples may have incomplete metadata due to filtering during the extraction process.
+*Note: Some samples may have incomplete metadata due to filtering during the extraction process.
+
+**License**
+
+The license for this dataset is Apache-2.0.