Upgrade: Update attrs requirement from >=25.3.0 to >=26.1.0

Updates the requirements on [attrs](https://github.com/python-attrs/attrs) to permit the latest version.
- [Release notes](https://github.com/python-attrs/attrs/releases)
- [Changelog](https://github.com/python-attrs/attrs/blob/main/CHANGELOG.md)
- [Commits](python-attrs/attrs@25.3.0...26.1.0)

---
updated-dependencies:
- dependency-name: attrs
  dependency-version: 26.1.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -5,7 +5,7 @@ aiosignal>=1.4.0
 aiosqlite>=0.21.0
 argon2-cffi>=25.1.0
 argon2-cffi-bindings>=25.1.0
-attrs>=25.3.0
+attrs>=26.1.0
 certifi>=2026.4.22
 charset-normalizer>=3.4.4
 discord.py>=2.6.3