Merge branch '26859-comment-button-doesn-t-align-vertically-with-line-number' into 'master'

Resolve "Comment button doesn't align vertically with line number"

Closes #26859

See merge request !8918

app/assets/stylesheets/pages/notes.scss

@@ -467,7 +467,7 @@ ul.notes {
   }
 
   .add-diff-note {
-    margin-top: -4px;
+    margin-top: -8px;
     border-radius: 40px;
     background: $white-light;
     padding: 4px;