Update README.md

README.md

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 license: apache-2.0
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-**Hierarchy Transformer (HiT)** is a framework aimed to provide universal hierarchy embedding in hyperbolic space with transformer encoder-based language models. 
+## Hierarchy Transformer
+
+Hierarchy Transformer (HiT) is a framework aimed to provide universal hierarchy embedding in hyperbolic space with transformer encoder-based language models. 
 
 ## Get Started