chore: update to Electron 28
As of the latest release (v1.5.8), upstream Obsidian has been updated to use Electron v28.2.3, so we should no longer need to use Electron 25.
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As of the latest release (v1.5.8), upstream Obsidian has been updated to use Electron v28.2.3, so we should no longer need to use Electron 25.