fix(widgets): expose number paginate option on product tab form

Update already accepted number; form select was still ajax/none only.

src/AKSRT/Widgets/WidgetProductTab.php

@@ -155,6 +155,7 @@ class WidgetProductTab extends \WP_Widget {
 			<label for="<?php echo esc_attr($this->get_field_id('paginate')); ?>"><?php esc_html_e('分页:', 'aksrt'); ?></label>
 			<select class="widefat" id="<?php echo esc_attr($this->get_field_id('paginate')); ?>" name="<?php echo esc_attr($this->get_field_name('paginate')); ?>">
 				<option value="ajax" <?php selected($instance['paginate'], 'ajax'); ?>><?php esc_html_e('AJAX', 'aksrt'); ?></option>
+				<option value="number" <?php selected($instance['paginate'], 'number'); ?>><?php esc_html_e('数字分页', 'aksrt'); ?></option>
 				<option value="none" <?php selected($instance['paginate'], 'none'); ?>><?php esc_html_e('无', 'aksrt'); ?></option>
 			</select>
 		</p>