chore(deps): bump vendor/ubuntu-desktop-provision (#34)

Bumps [vendor/ubuntu-desktop-provision](https://github.com/canonical/ubuntu-desktop-provision) from `b76bfbd` to `c46f976`.
- [Commits](canonical/ubuntu-desktop-provision@b76bfbd...c46f976)

---
updated-dependencies:
- dependency-name: vendor/ubuntu-desktop-provision
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>