Update README.md with license information

We (01.AI) have updated our license from yi-license to apache-2.0.
Since apache-2.0 enables more free and flexible use and distribution, promoting open collaboration and innovation, we kindly advise that all Yi derivatives currently under the yi-license be updated to the apache-2.0 license.
Thanks for your understanding and cooperation.

README.md

@@ -1,9 +1,6 @@
 ---
 base_model: 01-ai/Yi-34B-Chat
 inference: false
-license: other
-license_link: LICENSE
-license_name: yi-license
 model_creator: 01-ai
 model_name: Yi 34B Chat
 model_type: yi
@@ -43,6 +40,7 @@ widget:
       s get started now shall We?"
   text: There's a place where time stands still. A place of breath taking wonder,
     but also
+license: apache-2.0
 ---
 <!-- markdownlint-disable MD041 -->