Fixes modal button alignment

app/assets/stylesheets/framework/modal.scss

@@ -59,7 +59,7 @@
   }
   @include media-breakpoint-up(sm) {
-    .btn:first-of-type {
+    .btn:nth-child(1) {
       margin-left: auto;
     }
   }

changelogs/unreleased/45453-fix-delete-protected-branch-btn.yml

+---
+title: Fixes modal button alignment
+merge_request: 22024
+author: Jacopo Beschi @jacopo-beschi
+type: fixed