Merge branch '25906-title-size' into 'master'

Resolve "Titles are bigger than usual"

Closes #25906

See merge request !8235

app/assets/stylesheets/pages/issuable.scss

@@ -434,6 +434,7 @@
 .issuable-meta {
   display: inline-block;
   line-height: 18px;
+  font-size: 14px;
 }
 
 .js-issuable-selector-wrap {

app/assets/stylesheets/pages/merge_requests.scss

@@ -104,7 +104,7 @@
   .mr-widget-body {
     h4 {
       font-weight: 600;
-      font-size: 17px;
+      font-size: 16px;
       margin: 5px 0;
       color: $gl-gray-dark;
 

changelogs/unreleased/25906-title-size.yml

+---
+title: Standardises font-size for titles in Issues, Merge Requests and Merge Request widget
+merge_request: 8235
+author: