fix: Fix parsing downloadFileCount property for BoxZipDownloadStatus

Author: BruceBlanchard

src/main/java/com/box/sdk/BoxZipDownloadStatus.java

@@ -83,7 +83,7 @@ void parseJSONMember(JsonObject.Member member) {
         String memberName = member.getName();
         if (memberName.equals("total_file_count")) {
             this.totalFileCount = value.asInt();
-        } else if (memberName.equals("download_file_count")) {
+        } else if (memberName.equals("downloaded_file_count")) {
             this.downloadFileCount = value.asInt();
         } else if (memberName.equals("skipped_file_count")) {
             this.skippedFileCount = value.asInt();