Update README.md

The model is fantastic! We would like to contribute by updating the base_model information in the model's README. This is to address the missing details in the model card. Thank you for your consideration!

README.md

@@ -1,9 +1,6 @@
 ---
-language: 
-- ko
-tags:
-- bart
-license: mit
+base_model:
+- gogamza/kobart-summarization
 ---