Add multilingual to the language tag

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

README.md

@@ -1,9 +1,12 @@
 ---
-language: ["uk", "en"]
+language:
+- uk
+- en
+- multilingual
+license: mit
 tags:
 - ukrainian
 - english
-license: mit
 ---
 
 This is a variant of the [google/mt5-base](https://huggingface.co/google/mt5-base) model, in which Ukrainian and 9% English words remain.