Update gif (#622)

(cherry picked from commit 26ee899)

Author: deliahu

README.md

@@ -5,7 +5,7 @@ Cortex is an open source platform for deploying machine learning models as produ
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 <!-- Set header Cache-Control=no-cache on the S3 object metadata (see https://help.github.com/en/articles/about-anonymized-image-urls) -->
-![Demo](https://d1zqebknpdh033.cloudfront.net/demo/gif/v0.8.gif)
+![Demo](https://d1zqebknpdh033.cloudfront.net/demo/gif/v0.11.gif)
 
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