Update README.md

README.md

@@ -8,6 +8,8 @@ library_name: transformers
 
 O4 optimized weights of [`NeuML/pubmedbert-base-embeddings-matryoshka`](https://huggingface.co/NeuML/pubmedbert-base-embeddings-matryoshka). 
 
+## Usage
+
 ```python
 from optimum.onnxruntime import ORTModelForFeatureExtraction
 from transformers import AutoTokenizer
@@ -39,4 +41,6 @@ embeddings = meanpooling(output, inputs['attention_mask'])
 dimensions = 256
 
 print("Sentence embeddings:")
-print(embeddings[:, :dimensions])
+print(embeddings[:, :dimensions])
+
+```