fix: fix CodeBlockItem type error.

7423076

Author: jaywcjlove

core/src/index.ts

@@ -23,7 +23,7 @@ export type CodeBlockData = {
   components: Record<CodeBlockItem['name'], React.FC>;
   data: Record<CodeBlockItem['name'], CodeBlockItem>;
   headings?: HeadingItem[];
-  headingsList: HeadingListType[];
+  headingsList?: HeadingListType[];
 };
 
 export const FUNNAME_PREFIX = '__BaseCode__';