Fix doctest
# What does this PR do?

We just need `# doctest: +IGNORE_RESULT` after `>>> dataset = load_dataset` as usual


Thanks for fixing!<|||||>Thanks @ydshieh! Sorry for breaking our streak of 6 days of no failures! <|||||>Oh, I haven't request yet and you already approved! Thanks a lot, so impressive your speed of response!<|||||>![image](https://user-images.githubusercontent.com/35901082/199562025-6426b986-744e-4858-b7e4-3f5b3c341bd2.png)
<|||||>_The documentation is not available anymore as the PR was closed or merged._<|||||>I am so bad in doctest ... What we need here is actually `# doctest: +IGNORE_RESULT`. Sorry.