Bump electron from 25.3.2 to 26.3.0 in /app

Bumps [electron](https://github.com/electron/electron) from 25.3.2 to 26.3.0.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/main/docs/breaking-changes.md)
- [Commits](electron/electron@v25.3.2...v26.3.0)

---
updated-dependencies:
- dependency-name: electron
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>