Fix admin-dl-horizontal (#25512)

![image](https://github.com/go-gitea/gitea/assets/2114189/fb731e07-da30-4470-8200-73b5ca8b78f1)


![image](https://github.com/go-gitea/gitea/assets/2114189/85930b6f-5df7-437f-863f-423f3b81dd26)

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Co-authored-by: HesterG <hestergong@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>

templates/admin/dashboard.tmpl

@@ -70,7 +70,7 @@
 			{{.locale.Tr "admin.dashboard.system_status"}}
 		</h4>
 		<div class="ui attached table segment">
-			<dl class="dl-horizontal admin-dl-horizontal">
+			<dl class="admin-dl-horizontal">
 				<dt>{{.locale.Tr "admin.dashboard.server_uptime"}}</dt>
 				<dd><relative-time format="duration" datetime="{{.SysStatus.StartTime}}">{{.SysStatus.StartTime}}</relative-time></dd>
 				<dt>{{.locale.Tr "admin.dashboard.current_goroutine"}}</dt>