refactor: 메서드 이름 수정

src/main/java/com/example/sharemind/payApp/presentation/PayAppController.java

@@ -20,7 +20,7 @@ public String confirmConsult(HttpServletRequest request) {
     }
 
     @PostMapping("/posts")
-    public String testConfirmPost(HttpServletRequest request) {
+    public String confirmPost(HttpServletRequest request) {
         return payAppService.confirmPost(request);
     }
 }