Woocommerceのマイページの住所内容を変更した時に走るhook

woocommerce_after_save_address_validation

例：

// define the woocommerce_after_save_address_validation callback 
function action_woocommerce_after_save_address_validation( $user_id, $load_address, $address ) { 
    // make action magic happen here... 
}; 
         
// add the action 
add_action( 'woocommerce_after_save_address_validation', 'action_woocommerce_after_save_address_validation', 10, 3 );

参照元：http://hookr.io/actions/woocommerce_after_save_address_validation/