tests: Adjust to NM 1.54.2 output change

Putting NM to sleep now says "off" instead of "sleep".

Author: martinpitt

tests/test_networkmanager.py

@@ -277,7 +277,7 @@ def test_global_state(self):
         self.assertRegex(self.read_general(), r"disconnected.*\sfull")
 
         self.dbusmock.SetGlobalConnectionState(NMState.NM_STATE_ASLEEP)
-        self.assertRegex(self.read_general(), r"asleep.*\sfull")
+        self.assertRegex(self.read_general(), r"(asleep|off).*\sfull")
 
     def test_connectivity_state(self):
         self.dbusmock.SetConnectivity(NMConnectivityState.NM_CONNECTIVITY_FULL)