build(deps): update pytest-mock requirement from ~=3.14.0 to ~=3.15.1

Updates the requirements on [pytest-mock](https://github.com/pytest-dev/pytest-mock) to permit the latest version.
- [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@v3.14.0...v3.15.1)

---
updated-dependencies:
- dependency-name: pytest-mock
  dependency-version: 3.15.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

test-requirements.txt

@@ -1,4 +1,4 @@
 pytest>=7.2.2, <8.4.0
-pytest-mock~=3.14.0
+pytest-mock~=3.15.1
 coverage>=7.2.2, <7.7.0
 testfixtures>=8.3.0, <= 10.0.0