newsupernova/vendor/magento/module-captcha/view/frontend/web/template/checkout/captcha.html

<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<input name="captcha_form_id" type="hidden" data-bind="value: formId,  attr: {'data-scope': dataScope}" />
<!-- ko if: (isRequired() && getIsVisible())-->
<div class="field captcha required" data-bind="blockLoader: getIsLoading()">
    <label data-bind="attr: {for: 'captcha_' + formId}" class="label"><span data-bind="i18n: 'Please type the letters and numbers below'"></span></label>
    <div class="control captcha">
        <input name="captcha_string" type="text" class="input-text required-entry" data-bind="value: captchaValue(), attr: {id: 'captcha_' + formId, 'data-scope': dataScope}" autocomplete="off"/>
        <div class="nested">
            <div class="field captcha no-label">
                <div class="control captcha-image">
                    <img data-bind="attr: {
                                        alt: $t('Please type the letters and numbers below'),
                                        title: $t('Please type the letters and numbers below'),
                                        height: imageHeight(),
                                        src: getImageSource(),
                                        }"
                         class="captcha-img"/>
                    <button type="button" class="action reload captcha-reload" data-bind="attr: {title: $t('Reload captcha')}, click: refresh">
                        <span data-bind="i18n: 'Reload captcha'"></span>
                    </button>
                </div>
            </div>
            <!-- ko if: isCaseSensitive()-->
            <div class="captcha-note note" data-bind="i18n: 'Attention: Captcha is case sensitive.'"></div>
            <!-- /ko -->
        </div>
    </div>
</div>
<!-- /ko -->