Bump pytest-mock from 3.7.0 to 3.8.1

Bumps [pytest-mock](https://github.com/pytest-dev/pytest-mock) from 3.7.0 to 3.8.1.
- [Release notes](https://github.com/pytest-dev/pytest-mock/releases)
- [Changelog](https://github.com/pytest-dev/pytest-mock/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-mock@v3.7.0...v3.8.1)

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

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

test_requirements.txt

@@ -24,7 +24,7 @@ pyparsing==3.0.9
 pytest==7.1.2
 pytest-cov==3.0.0
 pytest-forked==1.4.0
-pytest-mock==3.7.0
+pytest-mock==3.8.1
 pytest-rerunfailures==10.2
 pytest-xdist==2.5.0
 PyVISA==1.11.3