adjust code block for python syntax

README.md

@@ -24,7 +24,7 @@ The feature style is specified as a named configuration when loading the dataset
 
 Load the **cf-nli** dataset
 
-```
+```python
 # if datasets not already in your environment
 !pip install datasets
 
@@ -44,7 +44,7 @@ ds_train = load_dataset('climate-fever-nli-stsb', 'cf-nli', split='train')
 
 Load the **cf-nli-nei** dataset
 
-```
+```python
 # if datasets not already in your environment
 !pip install datasets
 
@@ -64,7 +64,7 @@ ds_train = load_dataset('climate-fever-nli-stsb', 'cf-nli-nei', split='train')
 
 Load the **cf-stsb** dataset
 
-```
+```python
 # if datasets not already in your environment
 !pip install datasets