Replace stale /downloads page with redirect to /download

Agent-Logs-Url: https://github.com/SasView/sasview.github.io/sessions/4f1bc8bf-3762-4c86-89c9-e0c4fe440f64

Co-authored-by: butlerpd <10955478+butlerpd@users.noreply.github.com>

Author: Copilot

downloads/README.md

@@ -1,12 +1,8 @@
-# downloads
-This folder is where files directly downloadable from the website live!
+---
+layout: page
+title: Redirecting...
+---
 
-Files in here may, or may not, be the same as those in 
-https://github.com/SasView/docs/tree/master/_downloads depending on how 
-recently files were updated relative to a SasView release.
-
-You can add/replace files in this folder to make them immediately available 
-via the website, rather than having to wait for the new release cycle.
-
-But don't forget to edit download.md in the folder above if you add a file!
-  
+<script>window.location.replace("/download");</script>
+<meta http-equiv="refresh" content="0; url=/download">
+<p>This page has moved. Please <a href="/download">click here</a> if you are not redirected automatically.</p>