⬆ Bump trio from 0.25.1 to 0.26.0

Bumps [trio](https://github.com/python-trio/trio) from 0.25.1 to 0.26.0.
- [Release notes](https://github.com/python-trio/trio/releases)
- [Commits](python-trio/trio@v0.25.1...v0.26.0)

---
updated-dependencies:
- dependency-name: trio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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