Merge branch '56556-fix-markdown-table-border' into 'master'

Fix markdown table border

Closes #56556

See merge request gitlab-org/gitlab-ce!24601

app/assets/stylesheets/framework/typography.scss

@@ -148,6 +148,7 @@
     @extend .table-bordered;
     margin: 16px 0;
     color: $gl-text-color;
+    border: 0;
 
     th {
       background: $label-gray-bg;

changelogs/unreleased/56556-fix-markdown-table-border.yml

+---
+title: Fix markdown table border.
+merge_request: 24601
+author:
+type: fixed