fix: update test to pass TypeScript check

- Use sync function instead of async for data rejection test
- This covers the rejection handling code path

Author: lh01217311

tests/uploader.spec.tsx

@@ -315,7 +315,7 @@ describe('uploader', () => {
         <Upload
           ref={uploadRef}
           action="/test"
-          data={async () => {
+          data={() => {
             throw new Error('data error');
           }}
         />,