fix collector multi schema (#15520)

integrations/schemas/collection-multi-module.json

@@ -9,7 +9,7 @@
       "type": "array",
       "description": "A list of single module templates",
       "items": {
-        "$ref": "./single-module.json"
+        "$ref": "./collection-single-module.json"
       }
     }
   },

integrations/schemas/deploy.json

@@ -53,13 +53,13 @@
                   "command"
                 ]
               }
+            }
           },
           "required": [
             "method",
             "commands"
           ]
         }
-        }
       },
       "additional_info": {
         "type": "string",