Update readme

README.md

@@ -15,4 +15,13 @@ gamayun-swahili-minikit
 broadcastnews-sw
 ```
 
-In total this dataset is ~3.4 GB, with over 21 million lines.
+In total this dataset is ~3.5 GB in size with over 21 million lines of text.
+
+## Usage
+
+This dataset can be downloaded and used as follows:
+
+```python
+from datasets import load_dataset
+ds = load_dataset("flax-community/swahili-safi")
+```