Bump attrs from 25.4.0 to 26.1.0 in /tools

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:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

tools/requirements.txt

@@ -1,6 +1,6 @@
 aiohttp==3.13.4
 amsterdam-schema-tools==7.6.3
-attrs==25.4.0
+attrs==26.1.0
 certifi==2024.7.4
 charset-normalizer==3.4.6
 click==8.3.1