build(deps-dev): bump ruff from 0.6.7 to 0.6.8

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.6.7 to 0.6.8.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.6.7...0.6.8)

---
updated-dependencies:
- dependency-name: ruff
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -18,7 +18,7 @@ charset-normalizer==3.3.2
     # via requests
 codespell==2.2.6
     # via -r requirements-dev.in
-coverage==7.6.1
+coverage[toml]==7.6.1
     # via
     #   -r requirements-dev.in
     #   pytest-cov
@@ -115,7 +115,7 @@ rpds-py==0.20.0
     # via
     #   jsonschema
     #   referencing
-ruff==0.6.7
+ruff==0.6.8
     # via -r requirements-dev.in
 six==1.16.0
     # via html5lib