feat: qna 기능수정

backend/src/main/java/com/edufocus/edufocus/qna/controller/QnaController.java

@@ -68,7 +68,7 @@ public class QnaController {
         }
     }
 
-    @DeleteMapping("/answer/delete/{qna_id}")
+    @PostMapping("/answer/delete/{qna_id}")
     public ResponseEntity<QnaResponseDto> deleteAnswer(@PathVariable("qna_id") Long qna_id)
     {
         try {

backend/src/main/java/com/edufocus/edufocus/qna/service/QnaServiceImpl.java

@@ -141,6 +141,6 @@ qnaRepository.deleteById(id);
         Qna findQna = qnaRepository.findById(id).orElse(null);
         findQna.setAnswer(null);
         qnaRepository.save(findQna);
-        
+
     }
 }