Updating old Android Jellybean (4.2.2) Device
According to the Wikipedia page for this device, officially, it only supported 4.2.2 at the highest.
You'd need to update it using a third-party software, such as LineageOS.
That said, the tablet itself is outside of even their maintenance window, and depending on which device you have (the Cellular version or the Wifi version), will need to manually build their latest OS for it.
All the standard disclaimers about modifying your android device with aftermarket software remain relevant here.