Bump electron in /benchmark/02-empty-app-frameless/electron

Bumps [electron](https://github.com/electron/electron) from 26.1.0 to 26.2.1.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/main/docs/breaking-changes.md)
- [Commits](electron/electron@v26.1.0...v26.2.1)

---
updated-dependencies:
- dependency-name: electron
  dependency-type: direct:development
...

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