build(deps) replace pytest-freezegun with pytest-freezer

Fixes #577

pyproject.toml

@@ -56,7 +56,7 @@ dev = [
     "pytest==8.3.3",
     "pytest-check==2.4.1",
     "pytest-cov==5.0.0",
-    "pytest-freezegun==0.4.2",
+    "pytest-freezer==0.4.8",
     "pytest-mock==3.14.0",
     "pytest-rerunfailures==14.0",
     "pytest-subprocess~=1.5.2",