chore: Edit text

src/components/Layout/Header.jsx

@@ -16,7 +16,7 @@ function Header() {
         <S.Nav>
           <div className="left">
             <S.NavItem to={URL.product}>기기 목록</S.NavItem>
-            <S.NavItem to={URL.post}>최신글</S.NavItem>
+            <S.NavItem to={URL.post}>판매글</S.NavItem>
           </div>
           <AuthMenu />
         </S.Nav>

src/pages/Posts/index.jsx

@@ -16,7 +16,7 @@ const Posts = () => {
 
   return (
     <S.Posts>
-      <Title>최신글</Title>
+      <Title>판매글</Title>
       <PostList
         data={data}
         page={page}