기관 정보 업데이트 json 오류 대응

src/main/java/com/eactive/eai/rms/onl/apim/portalorg/PortalOrgManController.java

@@ -90,7 +90,7 @@ public class PortalOrgManController extends BaseAnnotationController {
     }
 
     @PostMapping(value = "/onl/apim/portalorg/portalOrgMan.json", params = "cmd=UPDATE")
-    public ResponseEntity<String> update(PortalOrgUI portalOrgUI) throws IOException {
+    public ResponseEntity<Void> update(PortalOrgUI portalOrgUI) throws IOException {
         portalOrgManService.update(portalOrgUI);
         return ResponseEntity.ok().build();
     }