Add link to llama3 README file (#3156)

Summary:
Pull Request resolved: #3156

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Reviewed By: kirklandsign

Differential Revision: D56362041

fbshipit-source-id: 472dd9864a26f2b8744673163a8cd2cea58cc8e7

examples/models/llama3/README.md

@@ -1,2 +1,2 @@
 # Summary
-For Llama3, use the same example code, minus tokenizer, as Llama2. Please see the ../llama2/README.md for details.
+For Llama3, use the same example code, minus tokenizer, as Llama2. Please see the [Llama2 README page](../llama2/README.md) for details.