[KC-108] resttemplate 설정 변경

src/main/java/com/kamco/cd/kamcoback/inference/service/InferenceResultService.java

@@ -215,6 +215,7 @@ public class InferenceResultService {
 
     HttpHeaders headers = new HttpHeaders();
     headers.setContentType(MediaType.APPLICATION_JSON);
+    headers.setAccept(List.of(MediaType.APPLICATION_JSON));
 
     ExternalCallResult result =
         externalHttpClient.call(inferenceUrl, HttpMethod.POST, dto, headers);