Bump pytest from 7.2.1 to 7.3.1 (#519)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 7.2.1 to 7.3.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@7.2.1...7.3.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

test_requirements.txt

@@ -1,7 +1,7 @@
 # Requirements to run unit tests. Tests import from
 # generated code.
 protobuf==4.21.12
-pytest==7.2.1
+pytest==7.3.1
 pytest-asyncio==0.20.3
 grpc-stubs==1.24.12.1
 grpcio-tools==1.51.1