fix: fix markdownTable error in some case (#2590)

Co-authored-by: pointhalo <[email protected]>

packages/semi-ui/markdownRender/components/table.tsx

@@ -6,27 +6,27 @@ import { omit } from 'lodash';
 
 
 
-const table = (props: PropsWithChildren<TableProps>)=>{
+const table = (props: PropsWithChildren<TableProps>) => {
 
     const { children } = props;
     const toArray = value => Array.isArray(value) ? value : [value];
     const columnsFiber = toArray(get(children[0], 'props.children.props.children'));
     const dataFiber = toArray(get(children[1], 'props.children'));
 
-    const titles: string[] = columnsFiber.map(item=>item?.props?.children || "");
+    const titles: string[] = columnsFiber.map(item => item?.props?.children || "");
     const tableDataSource: any[] = [];
     for (let i = 0;i < dataFiber.length;i++) {
         let item: Record<string, string> = {
             key: String(i)
         };
-        dataFiber[i]?.props.children.forEach((child, index)=>{
+        dataFiber[i]?.props.children?.forEach?.((child, index) => {
             item[titles[index]] = child?.props?.children ?? "";
         });
         tableDataSource.push(item);
     }
 
 
-    return <Table dataSource={tableDataSource} columns={titles.map(title=>{
+    return <Table dataSource={tableDataSource} columns={titles.map(title => {
         return {
             title,
             dataIndex: title