Update dependency pytest-mock to v3.12.0

Author: renovate[bot]

django-starter/Pipfile

@@ -18,7 +18,7 @@ Sphinx = "==4.2.0"
 tox = "==3.24.4"
 pytest = "==6.2.5"
 pytest-cov = "==2.12.1"
-pytest-mock = "==3.6.1"
+pytest-mock = "==3.12.0"
 pytest-randomly = "==3.10.1"
 pytest-xdist = "==2.3.0"
 # Django dev tools