fix(#2483): hide zendesk in thanks page

src/pages/ThanksPage/index.tsx

@@ -15,6 +15,9 @@ const ThanksPage = () => {
     window.parent.postMessage('close')
   }
 
+  const iframeZendesk = document.querySelector('#launcher') as HTMLElement
+  if (iframeZendesk) iframeZendesk.style.display = 'none'
+
   return (
     <ScWrapper>
       <ScBody>