Vietnamese language support on web (#3549)

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [X] New Feature (non-breaking change which adds functionality)

web/src/locales/zh.ts

@@ -437,6 +437,7 @@ export default {
       multiTurnTip:
         '在多轮对话的中，对去知识库查询的问题进行优化。会调用大模型额外消耗token。',
       howUseId: '如何使用聊天ID？',
+      description: '助理描述',
     },
     setting: {
       profile: '概要',