<meta HTTP-EQUIV="REFRESH" content="0; url=http://whatever">
Note the syntax where content=”0; is not a typo. The content field contains both the URL to be redirect to and the delay (in seconds).
In general, you may want to provide a message and therefore a non=zro delay so tat the user can read any information you want to provide.
<meta HTTP-EQUIV="REFRESH" content="5; url=http://whatever">
<p>You will be redirected to <a href="http://whatever">The RTools pypi link in a few seconds.</a> Please update your bookmark.</p>