Update README.md

README.md

@@ -17,7 +17,7 @@ OpenSearch neural sparse feature supports learned sparse retrieval with lucene i
 ## Usage (HuggingFace)
 This model is supposed to run inside OpenSearch cluster. But you can also use it outside the cluster, with HuggingFace models API. 
 
-```
+```python
 import json
 import itertools
 import torch