Update README.md with license information

Hi, I'm Chen, a DevRel specialist from 01.AI.
We have updated our license from yi-license to apache-2.0, and this PR is about the update for your model.
Apache-2.0 enables more free and flexible use and distribution, promoting open collaboration and innovation.
If it looks good to you, you can update other Yi model derivatives now licensed under yi-license to apache-2.0.
Thanks for your understanding and cooperation.

README.md

@@ -1,5 +1,4 @@
 ---
-license: other
 datasets:
 - allenai/ai2_arc
 - unalignment/spicy-3.1
@@ -30,8 +29,6 @@ datasets:
 - LDJnr/Capybara
 - JULIELab/EmoBank
 - kingbri/PIPPA-shareGPT
-license_name: yi-license
-license_link: https://huggingface.co/01-ai/Yi-34B-200K/blob/main/LICENSE
 model-index:
 - name: UNA-34Beagles-32K-bf16-v1
   results:
@@ -135,6 +132,7 @@ model-index:
     source:
       url: https://huggingface.co/spaces/HuggingFaceH4/open_llm_leaderboard?query=one-man-army/UNA-34Beagles-32K-bf16-v1
       name: Open LLM Leaderboard
+license: apache-2.0
 ---
 
 # A bagel, with everything