Fix pep8 error

Summary of changes:
- Fix minor formatting error triggered by upgrade from flake8
 3.9.2 -> 7.1.1.
- Bump flake8 for py312 compatibility (see related-pr)

Related-PR: openstack-charmers/release-tools#301
Change-Id: Id0f53ee333833b62078c0f5bedd3e55e63cfd422

Author: MylesJP

hooks/neutron_api_utils.py

@@ -807,7 +807,7 @@ def migrate_neutron_database(upgrade=False):
         return
 
     log('Migrating the neutron database.')
-    if(os_release('neutron-server') == 'juno' and
+    if (os_release('neutron-server') == 'juno' and
        config('neutron-plugin') == 'vsp'):
         nuage_vsp_juno_neutron_migration()
     else:

tox.ini

@@ -65,7 +65,7 @@ deps =
 
 [testenv:pep8]
 basepython = python3
-deps = flake8==3.9.2
+deps = flake8==7.1.1
        git+https://github.com/juju/charm-tools.git
 commands = flake8 {posargs} hooks unit_tests tests actions lib files
            charm-proof