Bump pytest-mock from 3.7.0 to 3.8.1 (#3616)

requirements_test.txt

@@ -7,7 +7,7 @@ pre-commit
 # Unit tests
 pytest==7.1.1
 pytest-cov==3.0.0
-pytest-mock==3.7.0
+pytest-mock==3.8.1
 pytest-asyncio==0.18.3
 asyncmock==0.4.2
 hypothesis==5.49.0