There used to be a bug on this step that required a forward slash at the end of the <link> tag so it ended with />. But that has been fixed as your HTML is passing for me. You might try using a different browser? I’m just guessing here since your HTML is correct.
If you are using the exact same HTML as posted at the top then it should work because that is the correct HTML. If you can’t get it to pass with any browsers then I don’t know what to say? Just move on to the next step knowing that you got this one right.
But you could try closing the <link> tag with /> to see if that helps.