Question template
# What does this PR do?

This PR updates the question template to insist a bit more on users using the forum for questions.
<img width="1402" alt="image" src="https://user-images.githubusercontent.com/7353373/98936078-c3bcb600-24e4-11eb-9ae3-6894af553004.png">

For some reason I don't see the "Question and Help" option when I try to open an issue @sgugger @LysandreJik <|||||>Mmm, guess the metadata at the top doesn't like the link.