Fix Accessing element.ref was removed in React 19

[oliviertassinari]

See https://codesandbox.io/p/devbox/muddy-http-h3r423?file=%2Fpages%2Findex.tsx%3A14%2C1&workspaceId=ws_JTzKEPRDQXMzzhKd3x4aSM as a reproduction of the problem

import NextLink from "next/link";

const ref = { current: null };

export default function Index() {
  return (
    <div>
      <NextLink href="/bar" legacyBehavior>
        <a ref={ref}>Link fail</a>
      </NextLink>
    </div>
  );
}

---

Context #72873 (comment) doesn't look accurate. However, going to https://github.com/mui/material-ui/tree/master/examples/material-ui-nextjs-pages-router and opening the /about page is enough to reproduce the problem.

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: a089535

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer

[oliviertassinari]

I wasn't sure how you guys want to check this, another option is:

Suggested change

	if (parseInt(React.version, 10) >= 19) {
	if ((element.props as any).propertyIsEnumerable('ref')) {