Fix: The number of deleted session prompts is displayed incorrectly. #13499 (#13500)

### What problem does this PR solve?

Fix: The number of deleted session prompts is displayed incorrectly.
#13499
### Type of change

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

web/src/locales/zh.ts

@@ -851,7 +851,7 @@ General：实体和关系提取提示来自 GitHub - microsoft/graphrag：基于
       tocEnhance: 'PageIndex',
       tocEnhanceTip: `解析文档时生成了目录信息（见General方法的'启用目录抽取'），让大模型返回和用户问题相关的目录项，从而利用目录项拿到相关chunk，对这些chunk在排序中进行加权。这种方法来源于模仿人类查询书本中知识的行为逻辑`,
       batchDeleteSessions: '批量删除',
-      deleteSelectedConfirm: '删除选中的 {count} 个会话？',
+      deleteSelectedConfirm: '删除选中的 {{count}} 个会话？',
     },
     setting: {
       Verify: '验证',