Update pytest requirement from ~=7.2.2 to ~=7.3.1

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@7.2.2...7.3.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:production
...

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

requirements.txt

@@ -3,7 +3,7 @@ httpx~=0.24.0
 hypercorn~=0.14.3
 pydantic~=1.10.7
 pydantic[email]
-pytest~=7.2.2
+pytest~=7.3.1
 PyYAML~=6.0
 uvloop~=0.17.0; sys_platform != 'win32'
 yarl~=1.8.2