This is important because what the article actually says is that Wikimedia supports zero rating Wikimedia content. The author of the article believes that any zero rating is against net neutrality.

That is not universally agreed upon. In particular, the FCC in its 2015 Open Internet Order did not ban zero rating.

This is important because the 2015 Open Internet Order is the current net neutrality law in the US, which the Republicans are trying very hard to repeal. That has been massively in the tech news, especially recently since the FCC has now scheduled a vote on their repeal plan.

That means that anyone reading the headline but not reading the article is going to think that it is saying Wikimedia does not support the current net neutrality law. Maybe they do, maybe they don't...but you cannot infer anything about that from their support of some zero rating.