ci(noxfile): updated deploy session

in nox version 2022.8.7, it is no longer permitted to use "session.install" in a session without virtualenv setup.
So, I set up python3.7 for this session since it is the one used in publish GitHub action workflow.

noxfile.py

@@ -41,7 +41,7 @@ def docs(session):
     session.run('mkdocs', 'build', '--clean')
 
 
-@nox.session(python=False)
+@nox.session(python=PYTHON_VERSIONS[1])
 def deploy(session):
     """
     Deploys on pypi.