fix: filter (#14770)

Co-authored-by: Jim Chen <chenshuai19950725@gmail.com>
Co-authored-by: Rick Cheng <rickchengx@gmail.com>
Co-authored-by: xiangzihao <460888207@qq.com>

dolphinscheduler-ui/src/views/projects/task/components/node/fields/use-child-node.ts

@@ -72,7 +72,8 @@ export function useChildNode({
     span: 24,
     name: t('project.node.child_node'),
     props: {
-      loading: loading
+      loading: loading,
+      filterable: true
     },
     options: options,
     class: 'select-child-node',