Add library_name and correct license

This PR adds the `library_name` tag to the metadata, as well as switches the license to apache-2.0.

README.md

@@ -9,7 +9,7 @@ language:
 - it
 - pt
 - es
-pipeline_tag: text-generation
+pipeline_tag: text-to-text
 tags:
 - llama
 - atla
@@ -18,7 +18,7 @@ tags:
 - meta
 - conversational
 - lm-judge
-license: llama3.1
+license: apache-2.0
 ---
 
 <p align="center">