Build(deps): Bump pytest-trio in /dependencies/default (#441)

Bumps [pytest-trio](https://github.com/python-trio/pytest-trio) from 0.7.0 to 0.8.0.
- [Release notes](https://github.com/python-trio/pytest-trio/releases)
- [Commits](python-trio/pytest-trio@v0.7.0...v0.8.0)

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

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dependencies/default/constraints.txt

@@ -14,7 +14,7 @@ packaging==21.3
 pluggy==1.0.0
 pyparsing==3.0.9
 pytest==7.2.0
-pytest-trio==0.7.0
+pytest-trio==0.8.0
 sniffio==1.3.0
 sortedcontainers==2.4.0
 tomli==2.0.1