chore(deps): bump lib/WinToast from 821c481 to a78ce46 (#5331)

Bumps [lib/WinToast](https://github.com/mohabouje/WinToast) from `821c481` to `a78ce46`.
- [Release notes](https://github.com/mohabouje/WinToast/releases)
- [Commits](mohabouje/WinToast@821c481...a78ce46)

---
updated-dependencies:
- dependency-name: lib/WinToast
  dependency-type: direct:production
...

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