fix link style

README.md

@@ -109,13 +109,12 @@ pinned: false
             <br />
             <br />
             If you need some help about implementing an unsupported model, here is a 
-            <a href="https://huggingface.co/docs/transformers/serialization#exporting-a-model-for-an-unsupported-architecture">
-                guide from HuggingFace's documentation
-            </a>.
+            <a 
+            href="https://huggingface.co/docs/transformers/serialization#exporting-a-model-for-an-unsupported-architecture" style="text-decoration: underline;">guide from HuggingFace's documentation</a>.
             <br />
             <br />
             If you want an example of implementation, I did one for 
-            <a href="https://github.com/huggingface/transformers/pull/14059">
+            <a href="https://github.com/huggingface/transformers/pull/14059" style="text-decoration: underline;">
             CamemBERT
             </a> some months ago.
             <br />