Update README.md

add licence and metadata tags

README.md

@@ -3,11 +3,17 @@ base_model: google/gemma-2-9b-it
 tags:
 - alignment-handbook
 - generated_from_trainer
+- DPO
 datasets:
 - princeton-nlp/gemma2-ultrafeedback-armorm
 model-index:
-- name: princeton-nlp/gemma-2-9b-it-DPO 
+- name: princeton-nlp/gemma-2-9b-it-DPO
   results: []
+license: gemma
+language:
+- en
+pipeline_tag: text-generation
+library_name: transformers
 ---
 
 # gemma-2-9b-it-DPO Model Card