SSL support / multiple bug fixes

【Contents of the fix】
■SSL support for the “Google Custom Search” widget
■Modified to common files with Welcart version.
■Updated WooCommerce template files (WooCommerce version: 5.2.2/5.3.0)
■Fixed the problem of “” at the end of the image link URL in the related article card link.

The files that have been modified for this update are as follows

【Modified files】
functions/card-link.php
header.php
languages/ja.mo
languages/ja.po
style.css
template-parts/footer-blog.php
widget/google-search.php
woocommerce/cart/mini-cart.php
woocommerce/checkout/form-pay.php
woocommerce/checkout/review-order.php
woocommerce/order/order-details-item.php
woocommerce/single-product/add-to-cart/grouped.php

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