slapos_jio: Add sample for string with text area

master/bt5/slapos_jio/SkinTemplateItem/portal_skins/slapos_hal_json_style/sample-software-schema/simpledemo/instance-input-schema.json.json

@@ -20,6 +20,13 @@
         "simple string C"
         ],
       "default": "simple string A"
+    },
+    "simple-string-with-text-area": {
+      "title": "Example of Simple String with textarea",
+      "description": "Example of Simple String with text area",
+      "type": "string",
+      "default": "Simple string",
+      "textarea": true
     },
      "simple-integer": {
       "title": "Example of Simple Integer",