If using emulators like Ryujinx, you can usually "Install to NAND" or right-click the base game to "Manage Title Updates" and select this file.
Ensure you already have the Base Game (Bayonetta 2) installed. An update file (ending in 0800 ) will not work on its own; it must be applied to the existing base game. Bayonetta™ 2 - Tinfoil Download [01007960049A0800][v65536][US] nsp rar
Most users use homebrew tools like Tinfoil or DBI to install the update from their SD card or via USB. If using emulators like Ryujinx, you can usually
The ID corresponds to an Update for Bayonetta 2 on the Nintendo Switch. Base Game ID: 01007960049A0000. If using emulators like Ryujinx