Add multilingual to the language tag

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

README.md

@@ -1,17 +1,17 @@
 ---
-language: 
-  - es
-  - en
+language:
+- es
+- en
+- multilingual
 license: other
-pipeline_tag: image-classification
-tags: 
+tags:
 - image-classification
+pipeline_tag: image-classification
 widget:
 - src: https://upserve.com/media/sites/2/Bill-from-Mezcalero-in-Washington-D.C.-photo-by-Alfredo-Solis-1-e1507226752437.jpg
   example_title: receipt
 - src: https://templates.invoicehome.com/invoice-template-us-neat-750px.png
   example_title: invoice
-
 ---
 
 **InvoiceReceiptClassifier_LayoutLMv3** is a fine-tuned LayoutLMv3 model that classifies a document to an invoice or receipt.