GitLab

* Fix: Align the Humaneval dataset with official results

Details:(1) modified the "doc_to_text" and "gen_prefix" in the "humaneval_instruct.yaml" file to make them the same as the Prompt in "meta-llama/Llama-3.1-70B-Instruct-evals".

(2) Change r.rfind("```") to r.find("```"), so it can locate the first "```", not the last one.

Results: Partially reproduced the official results: The result of LLaMA3.1-8B-Instruct is 66.5 (the official result is 72.6), and the result of LLaMA3.1-70B-Instruct is 80.5 (the official result is 80.5).

Ref: PR#2650

* add changelog and version

* add changelog