Add multilingual to the language tag

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

README.md

@@ -8,6 +8,8 @@ language:
 - zh
 - es
 - ru
+- multilingual
+license: cc-by-sa-4.0
 tags:
 - Summarization
 - abstractive summarization
@@ -15,7 +17,6 @@ tags:
 - Czech
 - text2text generation
 - text generation
-license: cc-by-sa-4.0
 datasets:
 - Multilingual_large_dataset_(multilarge)
 - cnc/dm