[nancy][grdix] change bmc mac adr for grdix-11

data/grid5000/sites/nancy/clusters/grdix/nodes/grdix-11.json

@@ -222,7 +222,7 @@
       "interface": "Ethernet",
       "ip": "172.17.65.21",
       "kavlan": false,
-      "mac": "7c:a6:2a:4e:31:ca",
+      "mac": "5c:ed:8c:01:8d:7c",
       "management": true,
       "mountable": false,
       "mounted": false,

input/grid5000/sites/nancy/clusters/grdix/nodes/grdix-11.yaml

@@ -70,7 +70,7 @@ grdix-11:
   network_adapters:
     bmc:
       ip: 172.17.65.21
-      mac: 7c:a6:2a:4e:31:ca
+      mac: 5c:ed:8c:01:8d:7c
       management: true
     eth0:
       driver: mlx5_core