Repurpose office-desk-south

The myStrom doesn't really fit nicely because of the not-so-flat OTO
socket nearby.

We will eventually use shadow-udmp to turn on shadow UDMP periodically
for config sync.

reflash.sh

@@ -41,7 +41,7 @@ for config in \
 		child-east-ac.yaml \
 		spare-power-meter.yaml \
 		office-desk-north.yaml \
-		office-desk-south.yaml \
+		shadow-udmp.yaml \
 		attic-central.yaml \
 		office-rack.yaml \
 		radiation.yaml \

shadow-udmp.yaml

@@ -1,9 +1,9 @@
 substitutions:
-  name: "office-desk-south"
+  name: "shadow-udmp"
-  friendly_name: "Office desk south"
+  friendly_name: "Shadow UDMP"
 
 esphome:
-  area: "Office"
+  area: "Basement"
 
 packages:
   device_base: !include templates/mystrom.yaml