Bump pytest from 7.4.4 to 8.0.0 in /requirements (#369)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 7.4.4 to 8.0.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@7.4.4...8.0.0)

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

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

requirements/requirements_test.txt

@@ -1,5 +1,5 @@
 ansys-mapdl-core>=0.60.4
 matplotlib>=3.5.3
-pytest==7.4.4
+pytest==8.0.0
 pytest-cov==4.1.0
 scipy>=1.7.3