build(deps-dev): bump pytest-xdist from 3.7.0 to 3.8.0

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/pytest-dev/pytest-xdist/releases)
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-xdist@v3.7.0...v3.8.0)

---
updated-dependencies:
- dependency-name: pytest-xdist
  dependency-version: 3.8.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Pipfile

@@ -14,7 +14,7 @@ psycopg = "==3.2.9"
 towncrier = "==24.8.0"
 psycopg-binary = {version = "==3.2.9", markers="implementation_name == 'cpython'"}
 pytest-cov = "==6.2.1"
-pytest-xdist = "==3.7.0"
+pytest-xdist = "==3.8.0"
 mock = "==5.2.0"
 mypy = "==1.16.1"
 types-setuptools = "==80.9.0.20250529"