The CNN article is taking the definition of an HGV entirely out of context from the underlying CSIS article it links. From the CSIS article:

> Russia’s Northern Fleet has begun preparations to deploy the air-launched ballistic missile Kh-47M2 Kinzhal on MiG-31K carriers. The deployment of the new hypersonic weapon is consistent with Russia’s ongoing and persistent efforts...

Not all hypersonics are HGVs/skip-glide weapons.