🐛 fix(#151): 답장하기 경로 수정

Author: yyypearl

src/app/independent/[id]/page.tsx

@@ -212,7 +212,7 @@ const IndependentLetterPage = () => {
           buttonType="primary"
           size="large"
           text="답장하기"
-          onClick={() => router.push('/send/letter')}
+          onClick={() => router.push('/send/receiver')}
         />
       </ButtonContainer>
     </Container>

src/app/letter/[id]/page.tsx

@@ -273,7 +273,7 @@ const LetterPage = () => {
           buttonType="primary"
           size="large"
           text="답장하기"
-          onClick={() => router.push('/send/letter')}
+          onClick={() => router.push('/send/receiver')}
         />
       </ButtonContainer>
     </Container>