Fix: the Display when the knowledge base empty. (#4496)

### What problem does this PR solve?

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/pages/knowledge/index.tsx

@@ -79,7 +79,7 @@ const KnowledgeList = () => {
           next={fetchNextPage}
           hasMore={hasNextPage}
           loader={<Skeleton avatar paragraph={{ rows: 1 }} active />}
-          endMessage={total && <Divider plain>{t('noMoreData')} 🤐</Divider>}
+          endMessage={!!total && <Divider plain>{t('noMoreData')} 🤐</Divider>}
           scrollableTarget="scrollableDiv"
         >
           <Flex