docs: update cascader doc

content/input/cascader/index-en-US.md

@@ -1831,6 +1831,8 @@ Some internal methods provided by Select can be accessed through ref:
 | ----------- | ------------------------------- | ------- |
 | close       | Manually close dropdown list    | v2.30.0 |
 | open        | Manually open dropdown list     | v2.30.0 |
+| focus       | Manually focus                  | v2.34.0 |
+| blur        | Manually blur                   | v2.34.0 |
 
 ## Accessibility
 

content/input/cascader/index.md

@@ -1815,6 +1815,8 @@ function Demo() {
 | ----------- | ----------------------------------- | ------- |
 | close       | 调用时可以手动关闭下拉列表          | v2.30.0 |
 | open        | 调用时可以手动展开下拉列表          | v2.30.0 |
+| focus       | 调用时可以手动聚焦                 | v2.34.0 |
+| blur        | 调用时可以手动失焦                 | v2.34.0 |
 
 ## Accessibility