Pin pytest in pre-commit mypy configuration

As discussed with chrysle, pinning of the dependencies in pyproject.toml will be addressed in the context of #1927.

Co-authored-by: chrysle <[email protected]>

.pre-commit-config.yaml

@@ -34,7 +34,7 @@ repos:
           - pip==20.3.4
           - build==1.0.0
           - pyproject_hooks==1.0.0
-          - pytest>=7.2.0
+          - pytest==7.4.2
   - repo: https://github.com/PyCQA/bandit
     rev: 1.7.5
     hooks: