[model_card] Fix metadata

model_cards/neuraly/bert-base-italian-cased-sentiment/README.md

@@ -1,11 +1,9 @@
 ---
 language: it
-thumbnail: "https://neuraly.ai/static/assets/images/huggingface/thumbnail.png"  
+thumbnail: https://neuraly.ai/static/assets/images/huggingface/thumbnail.png
 tags:
-  
 - sentiment
 - Italian
-  
 license: MIT
 widget:
 - text: "Huggingface è un team fantastico!"