Docs: HTTPS Error

[gricey432]

The docs appear to have a misconfigured certificate.

[mojoaxel]

We, the maintainer are not in control over the visjs.org domain. Only someone from almende, e.g. @ludost could fix that.

• https://help.github.com/articles/troubleshooting-custom-domains/#https-errors
• https://help.github.com/articles/using-a-custom-domain-with-github-pages/
• https://help.github.com/articles/securing-your-github-pages-site-with-https/