Add multilingual to the language tag

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

README.md

@@ -1,23 +1,23 @@
 ---
-license: 
+language:
+- it
+- en
+- de
+- fr
+- es
+- multilingual
+license:
 - mit
-datasets: 
-  - xtreme
-language: 
-  - it
-  - en
-  - de
-  - fr
-  - es
+datasets:
+- xtreme
 metrics:
 - precision: 0.874
-- recall: 0.880
+- recall: 0.88
 - f1: 0.877
 - accuracy: 0.943
 inference:
   parameters:
-    aggregation_strategy: "first"
-    
+    aggregation_strategy: first
 ---
 
 # gunghio/xlm-roberta-base-finetuned-panx-ner