GitHub Desktop Plus v3.5.5-beta3

Upstream: GitHub Desktop 3.5.5-beta3 release notes

This update focuses mainly on updating to Node v24 and Electron v40 to match the upstream repositories, as well as major changes and simplifications to the CI pipeline for Linux.
As a result, 32-bit ARM systems and very old distros (glibc < 2.28) are no longer supported.

If you encounter any error when updating to this version, please open an issue so that I can fix it before the final 3.5.5 release.

Fixes:

• Fix IME composition handling in branch name input. Thanks @keyboard2005!