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/en.ts

@@ -439,6 +439,7 @@ The above is the content you need to summarize.`,
       multiTurnTip:
         'In multi-round conversations, the query to the knowledge base is optimized. The large model will be called to consume additional tokens.',
       howUseId: 'How to use chat ID?',
+      description: 'Description of assistant',
     },
     setting: {
       profile: 'Profile',