Apply suggestion from @zoewangg

Author: zoewangg

services/s3/src/test/java/software/amazon/awssdk/services/s3/internal/multipart/utils/MultipartUploadTestUtils.java

@@ -77,9 +77,9 @@ public static void stubSuccessfulPutObjectCall(S3AsyncClient s3AsyncClient) {
 
                 @Override
                 public CompletableFuture<PutObjectResponse> answer(InvocationOnMock invocationOnMock) {
-                    AsyncRequestBody AsyncRequestBody = invocationOnMock.getArgument(1);
+                    AsyncRequestBody asyncRequestBody = invocationOnMock.getArgument(1);
                     // Draining the request body
-                    AsyncRequestBody.subscribe(b -> {
+                    asyncRequestBody.subscribe(b -> {
                     });
 
                     return CompletableFuture.completedFuture(PutObjectResponse.builder()