애플 회원 탈퇴 에러 수정 반영 (#208)

(# 입력 하고 이슈 선택)

### Proposed Changes
(PR 목적과 변경사항을 적어주세요.)

### Code Review Point
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---------

Co-authored-by: JuHyun Kim <95271588+skydreamer21@users.noreply.github.com>
Co-authored-by: keongmini <kmnam09@gmail.com>
Co-authored-by: skydreamer <skydreamer210@gmail.com>

Author: 3 people

src/main/kotlin/com/ssak3/timeattack/member/service/AuthService.kt

@@ -188,6 +188,7 @@ class AuthService(
         )
     }
 
+    @Transactional
     fun withdraw(member: Member) {
         val requestedMemberId = checkNotNull(member.id, "memberId")
 
@@ -202,7 +203,7 @@ class AuthService(
                 oAuthClient.unlink(member.oAuthProviderInfo.subject)
             }
             OAuthProvider.APPLE -> {
-                val oAuthClient = oAuthClientFactory.getClient(OAuthProvider.KAKAO)
+                val oAuthClient = oAuthClientFactory.getClient(OAuthProvider.APPLE)
                 oAuthClient.unlink(requestedMemberId.toString())
             }
             OAuthProvider.GOOGLE -> TODO()