pip: update pytest requirement in /mapping/tests

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@7.4.0...9.0.2)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

mapping/tests/requirements-test.txt

@@ -6,7 +6,7 @@
 # pip install -r requirements-test.txt
 
 # Core testing framework
-pytest>=7.4.0,<8.0.0
+pytest>=7.4.0,<10.0.0
 pytest-cov>=4.1.0,<5.0.0
 pytest-mock>=3.11.1,<4.0.0