Fix margin for submit button with captcha

- no space before

Changelog: fixed

app/assets/stylesheets/startup/startup-signin.scss

@@ -772,6 +772,9 @@ svg {
 .gl-mt-2 {
   margin-top: 0.25rem;
 }
+.gl-mt-5 {
+  margin-top: 1rem;
+}
 .gl-mb-3 {
   margin-bottom: 0.5rem;
 }

app/views/devise/shared/_signup_box.html.haml

@@ -62,7 +62,7 @@
     %div
     - if show_recaptcha_sign_up?
       = recaptcha_tags nonce: content_security_policy_nonce
-    .submit-container
+    .submit-container.gl-mt-5
       = f.submit button_text, class: 'btn gl-button btn-confirm gl-display-block gl-w-full', data: { qa_selector: 'new_user_register_button' }
     = render 'devise/shared/terms_of_service_notice', button_text: button_text
     - if show_omniauth_providers && omniauth_providers_placement == :bottom

ee/app/assets/stylesheets/startup/startup-signin.scss

@@ -772,6 +772,9 @@ svg {
 .gl-mt-2 {
   margin-top: 0.25rem;
 }
+.gl-mt-5 {
+  margin-top: 1rem;
+}
 .gl-mb-3 {
   margin-bottom: 0.5rem;
 }