Format llama read me page

Summary:
Current rendering is a bit off, it's supposed to be text but rendered as code

 {F1980589435}

Rollback Plan:

Differential Revision: D78847177

Author: cccclai

examples/models/llama/README.md

@@ -224,10 +224,11 @@ python -m extension.llm.export.export_llm \
     +base.checkpoint=<consolidated.00.pth.pth> \
     +base.params=<params.json>
 ```
-    Due to the larger vocabulary size of Llama 3, we recommend quantizing the embeddings with `quantization.embedding_quantize=\'4,32\'` as shown above to further reduce the model size.
 
+Due to the larger vocabulary size of Llama 3, we recommend quantizing the embeddings with `quantization.embedding_quantize=\'4,32\'` as shown above to further reduce the model size.
 
-    If you're interested in deploying on non-CPU backends, [please refer the non-cpu-backend section](non_cpu_backends.md)
+
+If you're interested in deploying on non-CPU backends, [please refer the non-cpu-backend section](non_cpu_backends.md)
 
 ## Step 3: Run on your computer to validate