drawio: 12.9.3 -> 12.9.9

Changelog:

- Updates to draw.io 12.9.9, changes from, and including, 12.9.4 to
  12.9.9 are new in this desktop release.
- Updates to Electron 8.2.1
- Fixes opening multiple files from explorer
- Fixes file path persistence

https://github.com/jgraph/drawio-desktop/releases/tag/v12.9.9