Apple on Tuesday night sent out minor updates of the software for Iphone, Ipad and Ipod Touch.
The focus in iOS 14.8.1 and Ipad OS 14.8.1 is on various security fixes. Among other things, a number of problems with Sidecar, Webkit and Voice Control are fixed accordingly Apples supportsidor.
To install the update, open the app Settings and go to General -> Software Update. Then just follow the instructions until the installation is complete.
If you have already upgraded to iOS 15 or Ipad OS 15, it is 15.1 which applies, this as it is not possible to go back to an older version of IOS.