refactor: standardize access token variable naming across routes

app/routes/_admin.lg-admin._dashboard.contents.update.$slug.tsx

@@ -7,11 +7,9 @@ import { FormContentsPage } from '~/pages/form-contents'
 import type { Route } from './+types/_admin.lg-admin._dashboard.contents.update.$slug'
 
 export const loader = async ({ request, params }: Route.LoaderArgs) => {
-  const { staffToken } = await handleCookie(request)
-  const { data: newsData } = await getNewsBySlug({
-    accessToken: staffToken,
-    slug: params.slug,
-  })
+  const { staffToken: accessToken } = await handleCookie(request)
+  const { slug } = params
+  const { data: newsData } = await getNewsBySlug({ accessToken, slug })
   return { newsData }
 }