fix(feedback): Fix getCurrentHub undefined (#7871)

Possible that the loader SDK has not loaded before rendering the widget modal (seems unlikely though)

Fixes DOCS-6A1

Author: billyvg

src/components/feedback/feedbackModal.tsx

@@ -188,7 +188,7 @@ export function FeedbackModal({open, onClose, onSubmit}: FeedbackModalProps) {
     });
   };
 
-  const user = window.Sentry?.getCurrentHub().getScope()?.getUser();
+  const user = window.Sentry?.getCurrentHub?.()?.getScope()?.getUser();
 
   return (
     <Dialog id="feedbackModal" open={open} ref={dialogRef} onClick={onClose}>