Link Windows 7 release files directly on the website

On the Windows 7 page, you link to the github releases page instead of directly to the file downloads.

The problem is, github is broken in the Internet Explorer version that is installed on a fresh Windows 7 (or 8.1) install due to it being outdated, making it difficult to download the installers.

The "Assets" button does not work.

On page load, sometimes the "assets" box is displaying it's contents, sometimes it's not. Last time I wanted to try Thorium on a fresh install of Windows 7 (or 8.1), I had to install Firefox ESR first, then load the thorium github releases page into Firefox, then download Thorium, which should not be nessasary if you intend to support Windows 7 (or 8.1), instead Thorium should be downloadable with the default browser of the OS you want to support.

Start at the Windows 7 page on the Thorium website and locate the links that currently point to the GitHub releases page. Change the relevant installer links to direct file downloads, then verify that they work in the default Internet Explorer browser on Windows 7 or 8.1.

Written by the indexing model from the issue text.