Add multilingual to the language tag

Hi! A PR to add multilingual to the language tag to improve the referencing.

README.md

@@ -4,13 +4,13 @@ language:
 - fr
 - ro
 - de
-datasets:
-- c4
+- multilingual
+license: apache-2.0
 tags:
 - summarization
 - translation
-
-license: apache-2.0
+datasets:
+- c4
 ---
 
 ## [t5-small](https://huggingface.co/t5-small) exported to the ONNX format