chore(deps-dev): bump pytest

Bumps the pip group with 1 update in the /apps/pii directory: [pytest](https://github.com/pytest-dev/pytest).


Updates `pytest` from 8.4.1 to 9.0.3
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.4.1...9.0.3)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.3
  dependency-type: direct:development
  dependency-group: pip
...

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

Author: dependabot[bot]

apps/pii/requirements-dev.txt

@@ -1,5 +1,5 @@
 # Test-only deps. Unit tests need requirements.txt + this file (no models);
 # integration tests additionally need the models baked into the docker images
 # (see tests/test_integration.py).
-pytest==8.4.1
+pytest==9.0.3
 httpx==0.28.1