This fact seems to be reliable and truthful. When researching it at first glance there are many sources that back it up coming from professors all the way to medical professionals. There are also good main facts from the original article. The Cleveland Clinic themselves are reliable and cite their sources as well, including various solutions as well.
Some facts from other sources include:
https://www.sharp.com/health-news/is-it-bad-to-hold-in-your-sneeze
Dr. Corinne Yarbrough an internal medical doctor that works with Sharp Rees-Stealy, states that,
"holding in your sneeze forces high-pressure air into the Eustachian tubes — located behind your cheekbones — and could result in a ruptured eardrum."
and “When you sneeze, the reflex first causes tightening of the muscles of the throat, eyes and mouth, followed by relaxation of the throat while the chest muscles contract.”
https://intermountainhealthcare.org/blogs/answers-to-silly-health-questions-and-myths
While this one is one of the sources in the original article, Intermountain Healthcare itself is another reliable organization.
Erik Berger, MD, states various facts such as,
"If you do hold in a sneeze, depending on where you catch it you could cause trauma to the eardrums if you're congested or you have fluid in your ears."