fix(storybook): fix test (#5325)

<img width="440" alt="image" src="https://github.com/toeverything/AFFiNE/assets/102217452/329f9c12-cc0b-4aae-9352-3811ab0a27a6">

packages/frontend/component/src/components/app-sidebar/add-page-button/index.tsx

@@ -21,7 +21,7 @@ export function AddPageButton({
 
   return (
     <button
-      data-testid="new-page-button"
+      data-testid="sidebar-new-page-button"
       style={style}
       className={clsx([styles.root, className])}
       onClick={onClick}

packages/frontend/component/src/components/page-list/components/new-page-buttton.tsx

@@ -95,7 +95,6 @@ export const NewPageButton = ({
     >
       <DropdownButton
         size={size}
-        data-testid="new-page-button"
         onClick={useCallback(() => {
           createNewPage();
           setOpen(false);