Feat: Add tooltip to delimiter filed #1909 (#3758)

### What problem does this PR solve?

Feat: Add tooltip to delimiter filed #1909

### Type of change


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

web/src/components/delimiter.tsx

@@ -25,6 +25,7 @@ const Delimiter = () => {
       label={t('knowledgeDetails.delimiter')}
       initialValue={`\\n!?;。；！？`}
       rules={[{ required: true }]}
+      tooltip={t('knowledgeDetails.delimiterTip')}
     >
       <DelimiterInput />
     </Form.Item>