[SHOPTIME-3569] Top banner 좌우버튼 클릭이슈

원인 : 홈배너데이터 변경시 length 계산오류
대책 : last index계산 오류 수정

com.twin.app.shoptime/src/views/HomePanel/HomeBanner/RollingUnit.jsx

@@ -105,7 +105,7 @@ export default function RollingUnit({
   const [startIndex, setStartIndex] = useState(
     savedIndex !== undefined ? savedIndex : 0
   );
-  const [lastIndex, setLastIndex] = useState(rollingDataLength - 1);
+  const lastIndex = rollingDataLength - 1;
   const [rollingFocus, setRollingFocus] = useState(false);
   const [contentsFocus, setContentsFocus] = useState(false);
   const [prevFocus, setPrevFocus] = useState(false);
@@ -222,7 +222,7 @@ export default function RollingUnit({
       return;
     }
     setStartIndex(startIndex + 1);
-  }, [startIndex]);
+  }, [startIndex, lastIndex]);
 
   // 베너 포커스 인
   const onFocus = useCallback(() => {