chore: fix color of server-side download button

The download button on the front page of the website is generated
client-side, and has a fallback in case we can't detect the user's
browser.

Before any of this happens, docusaurus generates the button on the
server-side, which is essentially a fallback that should never be
seen. This button is the last thing in our codebase using indigo
(blue) and is missing the mt-6 mb-1 spacing from the client-side
version.

This change just fixes the color and mt/mb so that the button is
identical to the client-side one on line 72. (matches current
style)

Signed-off-by: Tim deBoer <[email protected]>

website/src/pages/index.tsx

@@ -89,7 +89,7 @@ function DownloadGenericLinks() {
   return (
     <div className="flex justify-center">
       <Link
-        className="no-underline hover:no-underline inline-flex text-white hover:text-white bg-indigo-500 border-0 py-2 px-6 focus:outline-none hover:bg-indigo-600 rounded text-lg"
+        className="no-underline hover:no-underline inline-flex text-white hover:text-white bg-purple-500 border-0 py-2 px-6 mt-6 mb-1 focus:outline-none hover:bg-purple-600 rounded text-lg"
         to="/downloads">
         Download Page
       </Link>