Bump pytest-xdist from 3.3.1 to 3.4.0

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 3.3.1 to 3.4.0.
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-xdist@v3.3.1...v3.4.0)

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

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

dev_requirements.txt

@@ -5,5 +5,5 @@ pre-commit==3.5.0;python_version>="3.8"
 pytest-dotenv==0.5.2
 dbt-tests-adapter~=1.7.1
 flaky==3.7.0
-pytest-xdist==3.3.1
+pytest-xdist==3.4.0
 -e .