Fix broken YAML frontmatter in zh translation

Auto-translation converted the single quotes around a UI label in the
description into nested ASCII double quotes inside the double-quoted
YAML value, breaking frontmatter parsing and failing the Astro content
sync (build-en and all build-locale-full jobs). Mirrored the English
source by using single quotes for the inner label.

Author: eandreeva-twr

src/locales/zh/show-plans-bottom-sheet.mdx

@@ -1,6 +1,6 @@
 ---
 title: "在底部弹出框中显示所有方案"
-description: "构建一个带有单一行动号召按钮、"显示所有方案"链接以及底部弹出框（展示完整产品列表）的主推付费墙。"
+description: "构建一个带有单一行动号召按钮、'显示所有方案'链接以及底部弹出框（展示完整产品列表）的主推付费墙。"
 metadataTitle: "在底部弹出框中显示所有方案 | 流程编辑器 | Adapty 文档"
 ---