Fix invalid linter error about onLoad on an iframe

web/components/ui/Modal/Modal.tsx

@@ -33,6 +33,7 @@ export default function Modal(props: Props) {
       sandbox="allow-same-origin allow-scripts allow-popups allow-forms"
       frameBorder="0"
       allowFullScreen
+      // eslint-disable-next-line react/no-unknown-property
       onLoad={() => setLoading(false)}
     />
   );