Bump attrs from 25.4.0 to 26.1.0

Bumps [attrs](https://github.com/sponsors/hynek) from 25.4.0 to 26.1.0.
- [Commits](https://github.com/sponsors/hynek/commits)

---
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]

requirements-dev.txt

@@ -1,5 +1,5 @@
 -r requirements.txt
-attrs==25.4.0
+attrs==26.1.0
 build==1.4.0
 certifi==2026.2.25
 colorama==0.4.6