Update README.md

README.md

@@ -45,7 +45,7 @@ ds = datasets.load_dataset("opensearch-project/msmarco-hard-negatives", split="t
 Related training example: **opensearch-sparse-model-tuning-sample**. ([GitHub](https://github.com/zhichao-aws/opensearch-sparse-model-tuning-sample))
 
 To convert the dataset to text-only format for sample repo training:
-```
+```python
 import datasets
 
 # 1) Load datasets