added an overflow:hidden to prevent h2 and h1 lines from overlapping images

app/assets/stylesheets/framework/typography.scss

@@ -102,6 +102,7 @@
     padding-bottom: 0.3em;
     border-bottom: 1px solid $white-dark;
     color: $gl-text-color;
+    overflow: hidden;
 
     &:first-child {
       margin-top: 0;
@@ -115,6 +116,7 @@
     padding-bottom: 0.3em;
     border-bottom: 1px solid $white-dark;
     color: $gl-text-color;
+    overflow: hidden;
   }
 
   h3 {

changelogs/unreleased/27142-divider-in-readme-is-overlaying-with-image.yml

+---
+title: added an overflow:hidden to prevent h2 and h1 lines from overlapping images
+merge_request:
+author: Gwen_
+type: fixed