Update pytest requirement from ~=7.4 to ~=8.1 in /package (#1841)

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...8.1.1)

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

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

package/test_requirements.txt

@@ -15,7 +15,7 @@ moto~=4.1.14
 psutil==5.9.6  # same as Kedro for now
 pylint~=3.0
 pylint-pydantic>=0.3.0
-pytest~=7.4
+pytest~=8.1
 pytest-asyncio~=0.21
 pytest-mock~=3.11
 pytest-cov~=4.1