fix: 리프레시 쿠키 만료일 문제 수정 (#103)

* refactor: AuthCookieHelper.setRefreshTokenCookie 리프레시 쿠키 만료시간을 milliseconds -> seconds로 수정

Author: hisonghy

src/main/java/com/ject/studytrip/auth/presentation/helper/AuthCookieHelper.java

@@ -11,8 +11,8 @@ public static ResponseCookie setOAuthSignupProfileCookie(String value) {
                 OAUTH_SIGNUP_KEY, value, Duration.ofMillis(OAUTH_SIGNUP_COOKIE_TTL_MILLIS));
     }
 
-    public static ResponseCookie setRefreshTokenCookie(String value, long maxAge) {
-        return setResponseCookie(AUTH_REFRESH_TOKEN, value, Duration.ofMillis(maxAge));
+    public static ResponseCookie setRefreshTokenCookie(String value, long maxAgeInSeconds) {
+        return setResponseCookie(AUTH_REFRESH_TOKEN, value, Duration.ofSeconds(maxAgeInSeconds));
     }
 
     private static ResponseCookie setResponseCookie(String name, String value, Duration maxAge) {