Adding Short Description

The space is giving an unknown configuration error with no error message.

README.md

@@ -1,6 +1,6 @@
 ---
 title: Perplexity
-emoji: 🤗
+emoji: 🚀
 colorFrom: blue
 colorTo: red
 sdk: static
@@ -19,6 +19,7 @@ description: >-
   For more information on perplexity, see [this
   tutorial](https://huggingface.co/docs/transformers/perplexity).
 license: apache-2.0
+short_description: Perplexity computation (avg. neg log-likelihood)
 ---
 
 # Perplexity Metric