Bump trio from 0.28.0 to 0.29.0 (#2041)

Bumps [trio](https://github.com/python-trio/trio) from 0.28.0 to 0.29.0.
- [Release notes](https://github.com/python-trio/trio/releases)
- [Commits](python-trio/trio@v0.28.0...v0.29.0)

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

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

Author: dependabot[bot]

poetry.lock

@@ -59,7 +59,7 @@ mypy = { version = ">=1.12,<1.16", optional = true }
 
 [tool.poetry.group.dev.dependencies]
 anyio = "^4.3"
-trio = "^0.28"
+trio = ">=0.28,<0.30"
 attrs = ">=24.2,<26.0"
 httpx = "^0.28"