Replaced remaining old domain (#1822)

Author: leo

components/feedback-input/header-feedback.js

@@ -490,7 +490,7 @@ const Emoji = React.memo(({ code }) => (
     decoding="async"
     width={20}
     height={20}
-    src={`https://assets.zeit.co/twemoji/1${code}.svg`}
+    src={`https://assets.vercel.com/twemoji/1${code}.svg`}
     alt="emoji"
   />
 ))