Fixes #7897: CEE 7/5 is only a power outlet, no power port

Ref:

* https://en.wikipedia.org/wiki/CEE_7_standard_AC_plugs_and_sockets#CEE_7/5_socket_and_CEE_7/6_plug_(French;_Type_E)
* https://blog.packetsar.com/wp-content/uploads/Power_and_Cooling_Cheat_Sheet.pdf

Author: ypid

netbox/dcim/choices.py

@@ -428,7 +428,7 @@ class PowerPortTypeChoices(ChoiceSet):
         )),
         ('International/ITA', (
             (TYPE_ITA_C, 'ITA Type C (CEE 7/16)'),
-            (TYPE_ITA_E, 'ITA Type E (CEE 7/5)'),
+            (TYPE_ITA_E, 'ITA Type E (CEE 7/6)'),
             (TYPE_ITA_F, 'ITA Type F (CEE 7/4)'),
             (TYPE_ITA_EF, 'ITA Type E/F (CEE 7/7)'),
             (TYPE_ITA_G, 'ITA Type G (BS 1363)'),