[sophia][musa] musa-1 BMC MAC update due to motherboard change

data/grid5000/sites/sophia/clusters/musa/nodes/musa-1.json

@@ -239,7 +239,7 @@
       "interface": "Ethernet",
       "ip": "172.17.133.1",
       "kavlan": false,
-      "mac": "7c:a6:2a:94:33:0c",
+      "mac": "7c:a6:2a:94:6c:d4",
       "management": true,
       "mountable": false,
       "mounted": false,