Bump pytest in /circleci/images/pgupgradetester/files/etc

Bumps [pytest](https://github.com/pytest-dev/pytest) from 9.0.2 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@9.0.2...9.0.3)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

circleci/images/pgupgradetester/files/etc/requirements.txt

@@ -46,7 +46,7 @@ pylsqpack==0.3.23; python_version >= '3.10'
 pyopenssl==25.3.0; python_version >= '3.7'
 pyparsing==3.2.5; python_version >= '3.9'
 pyperclip==1.9.0
-pytest==9.0.2; python_version >= '3.10'
+pytest==9.0.3; python_version >= '3.10'
 pytest-asyncio==1.3.0; python_version >= '3.10'
 pytest-repeat==0.9.4; python_version >= '3.9'
 pytest-timeout==2.4.0; python_version >= '3.7'