Hi,
From the "docs" tab of the website
(http://www.phpmyadmin.net/home_page/docs.php) the first link is to the new documentation ("Main documentation") at https://docs.phpmyadmin.net/en/latest/ -- but I get a security warning, because the certificate is issued for readthedocs.org not phpmyadmin.net. I suggest either changing the URL to the readthedocs one (https://phpmyadmin.readthedocs.org/en/latest/) or making it an http rather than https connection. None of the other links (Downloadable documentation and Frequently Asked Questions) suffer the problem because they're linked to readthedocs.org.
Regards ~isaac