chore(deps-dev): bump ruff from 0.15.5 to 0.15.6 in /requirements

Bumps [ruff](https://github.com/astral-sh/ruff) from 0.15.5 to 0.15.6.
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.5...0.15.6)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements/dev.txt

@@ -12,4 +12,4 @@ pyelftools~=0.32 # Used to verify the generated Go binary architecture in integr
 # formatter
 black==26.3.0; python_version>="3.10"
 black==25.11.0; python_version<"3.10"
-ruff==0.15.5
+ruff==0.15.6