fix: rename to skinSettings to follow hub naming

Author: wa0x6e

src/schemas/space.json

@@ -475,7 +475,7 @@
           "required": ["enabled", "bribeEnabled"],
           "additionalProperties": false
         },
-        "skinParams": {
+        "skinSettings": {
           "type": "object",
           "properties": {
             "bg_color": {