Merge branch '29000-recaptcha-margin' into 'master'

add margin between captcha and register button

Closes #29000

See merge request !12607

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

@@ -25,7 +25,7 @@
       %div
       - if Gitlab::Recaptcha.enabled?
         = recaptcha_tags
-      %div
+      .submit-container
         = f.submit "Register", class: "btn-register btn"
 .clearfix.submit-container
   %p