World events often have a dramatic impact on online services. A past example would be the death of Michael Jackson which brought down Twitter and Wikipedia and made Google believe that they were under attack according to the BBC.
Events like the COVID-19 (Coronavirus) pandemic have less instantaneous affect but trends can still be seen to change. Cloudflare recently posted about some of the internet wide traffic changes due to the pandemic and various government announcements, quarantines and lockdowns.
Hacking has nothing to do with it. One of the definitions of hacking is to “gain unauthorized access to data in a system or computer”. What actually happened is someone, somewhere, edited the article, which everyone is able and authorized to do. Editing is a feature, and its the main action that happens on Wikipedia.
The word ‘hack’ used to mean something, and hackers were known for their technical brilliance and creativity. Now, literally anything is a hack — anything — to the point where the term is meaningless, and should be retired.