Bump attrs from 25.4.0 to 26.1.0

Bumps [attrs](https://github.com/python-attrs/attrs) from 25.4.0 to 26.1.0.
- [Release notes](https://github.com/python-attrs/attrs/releases)
- [Changelog](https://github.com/python-attrs/attrs/blob/main/CHANGELOG.md)
- [Commits](python-attrs/attrs@25.4.0...26.1.0)

---
updated-dependencies:
- dependency-name: attrs
  dependency-version: 26.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

poetry.lock

@@ -62,7 +62,7 @@ check-laws = ["pytest", "hypothesis"]
 [tool.poetry.group.dev.dependencies]
 anyio = "^4.3"
 trio = ">=0.30,<0.34"
-attrs = "^25.3"
+attrs = ">=25.3,<27.0"
 httpx = "^0.28"
 wemake-python-styleguide = "^1.6"
 codespell = "^2.2"