fix : useAppRouter > useRouter로 수정

스택이 바뀌면서 데이터가 저장 안되는 이슈

src/hooks/useFunnel.tsx

@@ -24,7 +24,7 @@ export function useFunnel<Steps extends NonEmptyArray<string>>(
   }
 ) {
   const searchParams = useSearchParams();
-  const { push, back, replace } = useAppRouter();
+  const { push, back, replace } = useRouter();
   const pathname = usePathname();
   const initialStep = options?.initialStep ?? steps[0];
   const queryKey = options?.stepQueryKey ?? 'step';