style: 优化管理员系列页面布局代码格式

src/routes/admin/series/+page.svelte

@@ -49,10 +49,7 @@
 				required
 			/>
 
-			<label
-				for="slug"
-				style="display: flex; justify-content: space-between; align-items: center;"
-			>
+			<label for="slug" style="display: flex; justify-content: space-between; align-items: center;">
 				<span>URL 别名 *</span>
 				<button
 					type="button"