Related issues on issues page is missing a border

What is the current bug behavior?

no border around related issues:

What is the expected correct behavior?

border:

Possible fixes

-     <div class="card-slim">
+     <div class="cardcard-slim">

in https://gitlab.com/gitlab-org/gitlab-ee/blob/f16f315dc3cfc9fc82571e6d3ef39922ca66ba7c/ee/app/assets/javascripts/related_issues/components/related_issues_block.vue#L164

and

-       .card-slim
+       .card.card-slim

in https://gitlab.com/gitlab-org/gitlab-ee/blob/8839e21d7971aefd87ccc21c529ee8af63168146/ee/app/views/projects/issues/_related_issues.html.haml#L6