Quite unexpectedly, Apple released an update to iOS/iPadOS. The latest version is 18.1.1. Before installing the update, we recommend making a backup.
Update:
The update to iOS/iPadOS 18.1.1 can be downloaded and installed directly from the device. To do this, go to your phone’s Settings, go to General and Updates. Finally, you need to press Download and install. The second way is to connect your device to your computer, launch Finder, select iPhone from the list, then click General, select Check for Updates and accept.
This update contains important security fixes and is recommended for all users.
Source: myapple.pl