Bump smithay-client-toolkit from a85f977 to dc8c4a0

Bumps [smithay-client-toolkit](https://github.com/Smithay/client-toolkit) from `a85f977` to `dc8c4a0`.
- [Commits](Smithay/client-toolkit@a85f977...dc8c4a0)

---
updated-dependencies:
- dependency-name: smithay-client-toolkit
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>