fix dropdown UI in job transfer (#5088)

* fix

* fix

Author: hzy46

src/webportal/src/app/job/job-view/fabric/job-transfer.jsx

@@ -302,7 +302,7 @@ const JobTransferPage = () => {
             <Stack className={styles.item}>
               <Stack horizontal gap={10}>
                 <Label required>Transfer to</Label>
-                <StackItem grow>
+                <Stack grow>
                   <Dropdown
                     placeholder={'select a bounded cluster'}
                     selectedKey={selectedCluster}
@@ -315,7 +315,7 @@ const JobTransferPage = () => {
                       return options;
                     })()}
                   />
-                </StackItem>
+                </Stack>
               </Stack>
             </Stack>
             <Stack className={styles.item}>