Merge branch 'diff-discussion-buttons-spacing' into 'master'

Fixes the spacing around diff discussion buttons

Closes #31102

See merge request !10879

app/assets/stylesheets/pages/note_form.scss

@@ -387,6 +387,7 @@
   @media (max-width: $screen-xs-max) {
     display: flex;
     width: 100%;
+    margin-bottom: 10px;
 
     .comment-btn {
       flex-grow: 1;

changelogs/unreleased/diff-discussion-buttons-spacing.yml

+---
+title: Fixed spacing of discussion submit buttons
+merge_request:
+author: