Fixed multiple bugs

【Contents of fixes】
■Added annotations for speed-up function.
■Added h1 tag to top page, archive page, medical information detail page, and fixed page.
■Fixed a bug that the header could not be fixed under WordPress 5.6 environment.

The following are the files that have been modified for this update.
【Modified file】
admin/inc/acceleration.php
admin/js/my_script.js
archive-faq.php
archive-news.php
archive-service.php
functions.php
functions/head.php
functions/logo.php
functions/ogp.php
index.php
js/header_fix.js
js/header_fix_mobile.js
languages/ja.mo
languages/ja.po
page-access.php
page-design1.php
page-design2.php
page.php
single-service.php
style.css

【Added files】
js/jquery.easing.1.4.js