Revert "fix: og:image 절대경로로 수정"

This reverts commit 30dd9c0.

Author: hongggyelim

pages/_app.tsx

@@ -20,10 +20,7 @@ export default function App({ Component, pageProps }: AppProps) {
           property="og:description"
           content="나만의 링크를 관리하는 Linkbrary"
         />
-        <meta
-          property="og:image"
-          content="https://linkbrary-9-99.vercel.app/images/home_main.png"
-        />
+        <meta property="og:image" content="/images/home_main.png" />
         <meta
           name="viewport"
           content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"