fix: rev version of python for use noxfile.py (#571)

Author: iennae

noxfile.py

@@ -55,7 +55,7 @@ def run_test(session, dir):
         success_codes=[0, 5])
 
 
-@nox.session(python="3.7")
+@nox.session(python="3.12")
 @nox.parametrize('dir', DIRS)
 def run_tests(session, dir=None):
     """Run all tests for all directories (slow!)"""