[fix]: Update io-package.json - correct descr of supportCustoms (#3022)

* Update io-package.json - correct descr of supportCustoms

* Fix JSON syntax in io-package schema

---------

Co-authored-by: Bluefox <[email protected]>

Author: mcm1957

schemas/io-package.json

@@ -1436,7 +1436,7 @@
           "type": "boolean"
         },
         "supportCustoms": {
-          "description": "If the adapter support settings for every state. It has to have custom.html file in admin. Sample can be found in ioBroker.history",
+          "description": "If the adapter supports settings for every state. It requires file jsonCustom.json in admin and \"common.adminUI\":{\"custom\":\"json\"}. Sample can be found in ioBroker.history",
           "type": "boolean"
         },
         "supportStopInstance": {