Merge branch '334655-grp-settings-repo-def-init-branch-name' into 'master'

Group Settings Default initial branch h4 expand

See merge request gitlab-org/gitlab!68667

app/views/groups/settings/repository/_initial_branch_name.html.haml

 %section.settings.as-default-branch-name.no-animate#js-default-branch-name{ class: ('expanded' if expanded_by_default?) }
   .settings-header
-    %h4
+    %h4.settings-title.js-settings-toggle.js-settings-toggle-trigger-only
       = _('Default initial branch name')
     %button.gl-button.js-settings-toggle{ type: 'button' }
       = expanded_by_default? ? _('Collapse') : _('Expand')