Bump gui-v2 from 8e09970 to d8790c9

Bumps [gui-v2](https://github.com/OpenEVSE/openevse-gui-v2) from `8e09970` to `d8790c9`.
- [Commits](OpenEVSE/openevse-gui-v2@8e09970...d8790c9)

---
updated-dependencies:
- dependency-name: gui-v2
  dependency-type: direct:production
...

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