Update ruff requirement from ~=0.3.4 to ~=0.6.4

Updates the requirements on [ruff](https://github.com/astral-sh/ruff) to permit the latest version.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.3.4...0.6.4)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:development
...

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

dev-requirements.txt

@@ -7,4 +7,4 @@ pytest-cov~=4.1.0
 pytest-asyncio~=0.21.1
 httpx~=0.25.0
 
-ruff~=0.3.4
+ruff~=0.6.4