Change captcha i18n key so that it has to be re-translated

The interpolations changed

modules/recaptcha/app/views/recaptcha/admin/show.html.erb

@@ -23,7 +23,7 @@
                                 container_class: '-middle' %>
         </div>
         <div class="form--field-instructions">
-          <%= I18n.t('recaptcha.settings.recaptcha_description_html',
+          <%= I18n.t('recaptcha.settings.captcha_description_html',
                      hcaptcha_link: link_to('https://docs.hcaptcha.com/switch/', 'https://docs.hcaptcha.com/switch/', target: '_blank'),
                      recaptcha_link: link_to('https://www.google.com/recaptcha', 'https://www.google.com/recaptcha', target: '_blank'),
                      turnstile_link: link_to('https://developers.cloudflare.com/turnstile/', 'https://developers.cloudflare.com/turnstile/', target: '_blank')).html_safe %>

modules/recaptcha/config/locales/en.yml

@@ -21,7 +21,7 @@ en:
       type_v3: 'reCAPTCHA v3'
       type_hcaptcha: 'HCaptcha'
       type_turnstile: 'Cloudflare Turnstile™'
-      recaptcha_description_html: >
+      captcha_description_html: >
         reCAPTCHA is a free service by Google that can be enabled for your OpenProject instance.
         If enabled, a captcha form will be rendered upon login for all users that have not verified a captcha yet.
         <br/>