Prevent js from blocking rendering

Hi
According to the description on the contact form 7 site, i load the scripts only where they are needed.
The description says:

Note that wpcf7_enqueue_scripts() and wpcf7_enqueue_styles() must be called before wp_head() is called.

Therefore i included the snippet like this:

<?php
/*
Template Name: planX-page
*/
?>

<?php /*contact form 7*/
    if ( function_exists( 'wpcf7_enqueue_scripts' ) ) {
        wpcf7_enqueue_scripts();
    }

    if ( function_exists( 'wpcf7_enqueue_styles' ) ) {
        wpcf7_enqueue_styles();
    }
?>

<?php get_header(); ?>

As a result the scripts are now blocking the rendering.
Is there a way to move the scripts, not the styles, to the bottom,
so they won’t block the rendering?

Thank you for your interest.
Regards
theo

https://wordpress.org/plugins/contact-form-7/