Fix thumbnail (#1490)

* correct ((

* fix thumbnail

Author: patrickvonplaten

_blog.yml

@@ -2812,7 +2812,7 @@
 - local: wuertschen
   title: "Introducing Würtschen: Fast Diffusion for Image Generation"
   author: dome272
-  thumbnail: /blog/assets/wuertschen/thumbnail.png
+  thumbnail: /blog/assets/wuerstchen/thumbnail.jpg
   date: September 13, 2023
   tags:
     - diffusion

wuertschen.md

@@ -1,6 +1,6 @@
 ---
 title: "Introducing Würtschen: Fast Diffusion for Image Generation" 
-thumbnail: /blog/assets/wuertschen/thumbnail.jpg
+thumbnail: /blog/assets/wuerstchen/thumbnail.jpg
 authors:
 - user: dome272
   guest: true