Update thumbnail in repo metadata (not done in this PR)

Hey

@jeffboudier
, just wanted to flag that the thumbnail doesn't exist. Would be cool to update to get nice thumbnails on social media

README.md

@@ -8,7 +8,7 @@ pinned: true
 license: apache-2.0
 header: mini
 app_file: dist/index.html
-thumbnail: https://huggingface.co/spaces/nanotron/distill-blog-template/resolve/main/thumbnail.png
+thumbnail: <should be updated>
 short_description: Why you need it, how to get it
 ---