⬆️ Update anyio requirement from ~=4.11.0 to ~=4.12.0

Updates the requirements on [anyio](https://github.com/agronholm/anyio) to permit the latest version.
- [Release notes](https://github.com/agronholm/anyio/releases)
- [Commits](agronholm/anyio@4.11.0...4.12.0)

---
updated-dependencies:
- dependency-name: anyio
  dependency-version: 4.12.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.dev.txt

@@ -1,4 +1,4 @@
-anyio~=4.11.0
+anyio~=4.12.0
 autoflake~=2.3.1
 pytest~=9.0.1
 pytest-mock~=3.15.1