Rename "Blog Configuration" to "App Configuration"

src/admin/AdminNav.tsx

@@ -55,7 +55,7 @@ export default function AdminNav({
             <BiCog
               size={18}
               className="inline-block"
-              aria-label="Blog Configuration"
+              aria-label="App Configuration"
             />
           </Link>
         </div>

src/app/admin/configuration/page.tsx

@@ -12,7 +12,7 @@ export default async function AdminConfigurationPage() {
         <div className="space-y-6">
           <div className="flex items-center">
             <div className="flex-grow">
-              Blog Configuration
+              App Configuration
             </div>
             <form action={syncCacheAction}>
               <SubmitButtonWithStatus