Multiple bug fixes

【Contents of the fix】
■Fixed a bug in which the “font type” of the catchphrase was not reflected in the fixed page header settings.
■Social Button Type 5 (Official Button) “Facebook Like Button” specification change support
■Changed the specification of the article list in the footer.
(In this section, the setting of “Fix this post at the top” will be disabled.)
■Fixed a bug where YouTube videos set as header content would not play when viewed on a smartphone.

The following are the files that have been modified for this update.

【Modified file】
footer.php
functions/head.php
page-design1.php
page-ranking.php
page.php
style.css
template-parts/sns-btn-btm.php
template-parts/sns-btn-top.php