fix: Provide scrollRef in GroupChannelList#1281

HoonBaek merged 2 commits intomainsendbird/sendbird-uikit-react:mainfrom

fix/CLNP-5891/Open-scrollRef-in-GroupChannelListsendbird/sendbird-uikit-react:fix/CLNP-5891/Open-scrollRef-in-GroupChannelListCopy head branch name to clipboard