Add multilingual to the language tag

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

README.md

@@ -1,28 +1,29 @@
 ---
+language:
+- en
+- is
+- multilingual
 license: agpl-3.0
 tags:
 - generated_from_trainer
 datasets:
 - glue
-language: 
-- en
-- is
 metrics:
 - matthews_correlation
 model-index:
 - name: XLMR-ENIS-finetuned-cola
   results:
   - task:
-      name: Text Classification
       type: text-classification
+      name: Text Classification
     dataset:
       name: glue
       type: glue
       args: cola
     metrics:
-    - name: Matthews Correlation
-      type: matthews_correlation
+    - type: matthews_correlation
       value: 0.6306425398187112
+      name: Matthews Correlation
 ---
 
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