LICENSE Text addition to Layout.html breaks Cassandra Website rendering

The newest docs contain a license agreement comment found in the layout.html of the theme.  This occurs before front matter indicator...
https://github.com/apache/cassandra/blob/cassandra-3.11/doc/source/_theme/cassandra_theme/layout.html

Jekyll assumes that the front matter while be at the top "—".  This causes Jekyll to break when serving the page on the website.

There are a few other docs that seem to have this problem, and serving the latest docs of the website breaks the rendering.