Update README.md

README.md

@@ -32,7 +32,10 @@ source_datasets:
 - allenai/s2orc
 ---
 
-<img src="https://huggingface.co/datasets/allenai/pes2o/resolve/main/peS2o.png" alt="peS2o logo. It's a picure of a mortar and pestle with documents flying in." width=256px height=auto>
+<p align="center">
+<img src="https://huggingface.co/datasets/allenai/pes2o/resolve/main/peS2o.png" alt="peS2o logo. It's a picure of a mortar and pestle with documents flying in." width=384px height=auto>  
+</p>
+
 
 *Pretraining Efficiently on [S2ORC][2]!*