data: fix settings yaml schema

data/schemas/settings-schema.yaml

@@ -1,17 +1,27 @@
 %YAML 1.2
 ---
-"modules-search":
-    type: str
+type: map
+mapping:
+  "modules-search":
+      type: seq
       required: yes
+      sequence:
+        - type: str
 
-instances:
+  "instances":
+      type: seq
+      required: yes
+      sequence:
         - type: map
           mapping:
             "id": { type: str }
             "module": { type: str }
             "config": { type: str }
         
-sequence:
+  "sequence":
+      type: seq
+      required: yes
+      sequence:
           - type: map
             mapping:
               "show":
@@ -27,8 +37,8 @@ sequence:
                 sequence:
                   - type: str
 
-"branding": { type: str, required: yes }
+  "branding": { type: str, required: yes }
   
-"prompt-install": { type: bool, required: yes, default: false }
+  "prompt-install": { type: bool, required: yes, default: false }
   
-"dont-chroot": { type: bool, required: yes, default: false }
+  "dont-chroot": { type: bool, required: yes, default: false }